R. C. Punnett conducted experiments on the inheritance of traits in the sweet pea, Lathyrus odoratus. In one experiment, he crossed two different true-breeding sweet pea plant strains, one with erect petals and long pollen, and the other with hooded petals and round pollen. All the offspring (F1F1 generation) had erect petals and long pollen (Figure 1).
Figure 1. Sweet pea plant cross
Next, Punnett allowed the F1F1 generation to self-fertilize and recorded the phenotypes of their offspring. The data are shown in Table 1.
Table 1. F2F2 results of F1F1 self-fertilization cross
How many degrees of freedom should be used when looking up the critical value for a chi-square analysis of the ratios of phenotypes observed among the F2F2 offspring versus the expected phenotypic ratio assuming independent assortment?
2A
3B
4C
5
Answers
The degree of freedom used when looking up the critical value for a chi- square analysis is 3 . The correct option to this question is B.
Seven chromosomal cells are produced as a result of meiosis I and II. Homologous chromosomes split apart in meiosis I. Sister chromatids split apart during meiosis II. 14 chromosomes are produced in the progeny of two cells that unite during fertilization.
Homologous chromosomes, which are sets of chromosomes with genes for the same qualities, split from one another during meiosis I. A zygote, which is created when an egg and sperm join to form a single cell, has 14 chromosomes because of the union of two cells, each of which has 7 of them, during the process of fertilization. Combining the 7 chromosomes contributed by the sperm and the 7 chromosomes provided by the egg, there are 14 chromosomes total. By following this procedure, the child is guaranteed to inherit both parents' whole genetic repertoire.
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Related Questions
Help .....plz help me
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Answer:
Where is question. Hope you understand me
Explanation:
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Which question cannot be tested with a scientific investigation?
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Answer:
forgot to add the question
How does cell division and growth occur?
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Which argument provides the best piece of evidence to support that mushrooms are living things? * A. Destiny says that mushrooms are living because they come from the soil. B. Alan says that mushrooms are living because they grow in his yard after it rains. C. Jacob says that mushrooms are living because they have a smooth texture. D. Frank says that mushrooms are living because they use oxygen.
Answers
D
Explanation:
Which of these is an example of negative feedback?
1. As a blood clot begins to form, the process of its formation gets faster and faster.
2. After you eat, glucagon stimulates an increase in blood sugar levels.
3. After you eat, insulin stimulates the lowering of blood sugar levels.
4. The digestive enzyme pepsinogen is converted to pepsin by the action of hydrochloric acid; pepsin itself can then convert pepsinogen into pepsin.
5. Once labor begins, contractions increase in frequency and intensity.
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After you eat, insulin stimulates the lowering of blood sugar levels is an example of negative feedback
Blood sugar levels are raised after eating, and insulin causes them to fall. In this case, the stimulus is countered by the response (raised blood sugar levels) (by lowering blood sugar levels). A negative feedback mechanism, often referred to as negative feedback homeostasis, is a system that is activated by an output deviation and results in output changes that are the exact opposite of the deviation that caused it.
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Number 8. was colorblind just like his father: Where did the son at 8 get his allele for colorblindness?
Answers
Answer:
son 8 inherited it from her.
Explanation:
Given that Son 8's mother is a carrier of the blindness allele
Assuming that the father is colorblind due to a genetic mutation, there are a few possible scenarios for how the son inherited the allele for colorblindness.
What is genetic inheritance?Genetic inheritance is the study of how certain inherited traits are passed down from generation to generation.
Assuming the father is colorblind due to a genetic mutation, there are a few possibilities for how the son inherited the colorblind allele:
His father's colorblindness allele was passed down to his son. The son in this case inherited the mutation from his father.The mother carries the colorblindness allele, which she passed on to her son. In this case, the son inherited the mutation from his mother, who is not colorblind but carries the gene.The colorblindness mutation is present in both the mother and father, and the son received one copy from each parent. This is a less likely scenario, but it is possible if both parents carry the gene.Thus, in any of these scenarios, the son inherited the allele for colorblindness from one or both of his parents.
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What gives shape; Protection against mechanical stress, and Osmotic
pressure; Provides support.
Answers
A cell wall gives shape, protection against mechanical stress, and osmotic pressure, provides support.
What is a cell wall?Some types of cells have an outside structural layer called a cell wall. It could be firm, malleable, or sporadically rigid.It serves as a filtration system as well as structural support and protection for the cell.What material makes up a cell wall?A matrix of cellulose microfibrils and cross-linking glycans that make up the cell wall can be found in the pectin polysaccharide matrix, which is highly cross-linked. Secondary cell walls may become lignin-rich.What is the cell wall's structure?The primary cell wall and the middle lamella are the two layers that are present in all cell walls, and many cells also develop a third layer that is known as the secondary wall. The intermediate lamella acts as a connecting layer between the cell's principal walls.How is the cell wall made?The development of the cell plate in the center of the cell triggers the start of cell wall production during cell division in the cytokinesis phase. Eventually, cellulose, hemicellulose, and pectin polymers are deposited to form the main cell wall.To learn more about cell wall visit:
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Which of the following factors of safety and effectiveness considers the distance of the weight or resistance from the joint?
a. biomechanics
b. momentum
c. alignment
d. stability
Answers
Answer:
C.
Explanation:
I took the test
While dry cleaners are small businesses, they generate relatively large volumes of hazardous substances. EPA estimates the average dry cleaner generates 660 gallons of hazardous wastes a year. Unlike petroleum contamination which may break down over time by naturally-occurring bacteria in the environment, the chlorinated solvents that are used by dry cleaners are resistant to biodegradation. As a result, groundwater contamination from dry cleaners has a greater potential to migrate off-site which can be problematic since dry cleaners are often located within proximity to residential neighborhoods. Indeed, a 2002 Florida study found that dry cleaner contamination had migrated off-site at 57 percent of the contaminated sites. Due to these types of environmental hazards when commercial land is sold require a Phase 1 Environmental Assessment according to the Comprehensive Environmental Response, Compensation and Liability Act. Why would the type of monitoring required as part Phase 1 Environmental Assessments be important if a dry cleaner was being sold?
A) The monitoring will indicate any environmental damage done that should be remediated prior to selling the land.
B) This type of monitoring will allow the government to only sell land to businesses that have environmentally friendly practices.
C) The monitoring prevents the land from being resold to any dry cleaning businesses which can be damaging to the environment.
D) The monitoring will allow the government to determine which type of business is better for the environment so dangerous businesses can be closed.
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Answer:B) This type of monitoring will allow the government to only sell land to businesses that have environmentally friendly practices.
Explanation: because will allow the government to only sell land to businesses that have environmentally friendly practices.
Factorise completely pq - q?
Answers
Explanation:
q(p-1) is the factorization of pq- q.
Murray has been diagnosed with social anxiety. His therapist's practice aligns closely with the psychological theory of abnormality that focuses on psychodynamic explanations of psychological disorders. Which explanation is Murray's therapist MOST likely to give to explain Murray's social anxiety?
Murray's thought process is illogical in that he believes no one will find him likeable.
Murray subconsciously expects people to leave him since he was abandoned by his father.
Murray's interactions with people were punished when they resulted in embarrassment.
Murray expresses an unusually high level of neuroticism and introversion.
Answers
Answer:
I'd go with D: Murray expresses an unusually high level of neuroticism and introversion.
Which of the following describes what might happen with a sudden increase in precipitation in the grassland biome?
Rise in drought-tolerant plants
Salt and sediment deposition
Decline in severe storms
Nutrient loss and soil erosion
Answers
Answer
Nutrient loss and soil erosion
Explanation:
Type the correct answer in the box. Spell all words correctly.
What is a close relationship between two organisms that live together called?
The close relationship between two organisms that live together is called
Reset
Next
Answers
Answer:
symbiosis.
Explanation:
The term that you are referring to is symbiosis. (a symbiotic relationship)
Symbiosis is a proximate and often long-term interaction between two or more different biological species.
How does Photosynthesis work? And what is the Photosynthesis equation?
Answers
Explanation:
photosynthesis the process by which green plants and some other organisms use sunlight to synthesize nutrients from carbon dioxide and water. Photosynthesis in plants generally involves the green pigment chlorophyll and generates oxygen as a by-product.
6CO2 + 12H2O + → C6H12O6 + 6O2 + 6H2O
Here, six molecules of carbon dioxide (CO2) combine with 12 molecules of water (H2O) using light energy. The end result is the formation of a single carbohydrate molecule (C6H12O6, or glucose) along with six molecules each of breathable oxygen and water.
Answer:
The process of photosynthesis is commonly written as:
6CO2 + 6H2O → C6H12O6 + 6O2.
This means that the reactants, six carbon dioxide molecules and six water molecules, are converted by light energy captured by chlorophyll (implied by the arrow) into a sugar molecule and six oxygen molecules, the products.
Consider the two samples of sedimentary rock seen here.Predict which rock would be more likely to undergo physical weathering. Explain how and why.
A) Sandstone. Sandstone has more obvious layers of sediments.
B) Shale. Shale is fine grained and is more likely to dissolve in water.
C)Sandstone. Sandstone is made of large sand-like grains and is easily eroded by wind
D)Shale. Shale contains iron which is an element that easily combines with the oxygen in the atmosphere to produce rust.
Answers
Answer: A) Sandstone. Sandstone has more obvious layers of sediments.
Step by step explanation: As you take a look at the given pictures, you notice that (Sandstone) Is more closed off than (Shale). So whenever rain comes, rain will seep into the little openings of the rock shale has, causing it to break down.Same for strong wind, since shale isn't as compacted as Sandstorm, then shale will not last very long. Therefore making Sandstone being able to undergo more harsh conditions.
Bc 8 science book page 105
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Asthma is a respiratory disorder that can cause the airways to temporarily constrict, or get narrower. Which function of the respiratory system is most affected by the narrowing of the airways? A. water balance B. air filtration C. heat balance D. gas exchange
Answers
Answer:
d
Explanation:
on edge
Do humans have DNA or RNA in the nucleus of your cells?
Answers
Answer:
Explanation:
RNA molecules are produced in the nucleus of human cells from DNA by a process called transcription, but they are found in the cytoplasm too. DNA is present only in the nucleus of the cell.
which bio molecules are indicative of atypical kidney function?
Answers
The bio molecules that serves as the indicative of a typical kidney function are Albuminuria and Proteinuria.
What is are kidney function?Kidneys can be described as the very important organ in the body that remove wastes and extra fluid from your body.
It should be noted that kidneys help to do away with acid that is produced by the cells hpowever when there is Proteinuria in the urine it implies that the there is kidney damage. More over the kidney failure can as well be seen when there is Albuminuria in excess in the urine which is not good for the body health.
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b. Describe the journey of a snowflake from when it falls to Earth until the water it contains
becomes groundwater. Include both the movements of the water and the processes involved.
There are many possibilities; limit your answer to one path. (2 points)
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Answer:
When a snowflake falls to Earth, it can land on the ground or on other surfaces, like trees or buildings. If it lands on the ground, it could either melt right away if the temperature is above freezing, join other snowflakes to form a snowpack, or percolate through the snowpack to form groundwater.
If the snowflake becomes part of a snowpack, it will experience periodic melting and refreezing as temperatures fluctuate. Over time, some of the snow will undergo metamorphism and become denser, forming a layer of firn. The weight of the snowpack compacts the layers below and forms glacial ice, which can move down slope due to gravity. This process is called a glacier's ablation zone, where the glacier loses mass.
Eventually, the ice and snow may seep into the ground and become groundwater. Groundwater travels through porous rocks and sediment and can sometimes be drawn up by wells. This journey from snowflake to groundwater involves multiple physical and chemical processes like melting, precipitation, infiltration, evaporation, condensation, metamorphism, and several geological phenomena.
NEED ANSWERED ASAP WORTH 30 POINTS
“Activity levels at the end of adolescence are
alarmingly low, and by age 19, they are
comparable to 60-year-olds," says a study
conducted by senior author, Vadim
Zipunnikov, assistant professor in the
Bloomberg School's Department of
Biostatistics. "For school-age children, the
primary window for activity was the afternoon
between two and six P.M. So the big question
is how do we modify daily schedules, in
schools for example, to be more conducive to
increasing physical activity?"
PLEASE ANSWER SOON WORTH 30 POINTS AND PLEASE ANSWER CORRECTLY THIS IS IMPORTANT. THANK YOUUU
Answers
Activity levels decline sharply in late adolescence, equivalent to 60-year-olds. To boost physical activity, we must adapt school schedules to prioritize the afternoon window of 2-6 P.M.
According to a study conducted by Vadim Zipunnikov, the activity levels of individuals at the end of adolescence are shockingly low, comparable to those of 60-year-olds. The study found that the primary window for activity among school-age children was the afternoon, specifically between two and six P.M. This raises an important question: How can we modify daily schedules, particularly in schools, to promote increased physical activity? By addressing this challenge, schools can create an environment that encourages and facilitates physical activity among students. Possible solutions could include incorporating more physical education classes, recess breaks, or after-school sports programs during this crucial time window.By making these changes, we can foster healthier habits and ensure that young people have ample opportunities to engage in physical activities, improving their overall well-being.For more such questions on Activity levels:
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Defining a system under study and making a model of it are tools for developing a better understanding of natural phenomena in science. Give an example of how system models are used by scientists to investigate natural and designed systems.
Answers
A systemic model is a type of synthetic illustration of a genuine sequence of events which occurs in nature.
Because it's hard to study many phenomena in nature or even other contexts without dissecting them into constituent parts.
Example, Atoms and other subatomic particles, for instance, are too tiny for humans to perceive. Because of this, scientists use a systems model to describe how they interact or how they combine to create visible matter. On a bigger scale, an engineer at an oil refinery might use a systems model that optimize the oil-refining process and reduce pollution while making the oil pure enough to be an usable fuel.
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What is given to wood whose normal cells have been replaced with mineral deposits?? please help
Answers
Answer:
PETRIFIED WOOD is the answer okkkkkkkkkkkkkkkk
Discuss one unique feature of the water cycle of Gorongosa National
Park (examples include Mt. Gorongosa, Lake Urema).
Answers
In Gorongosa National Park, large number of diverse plants and animals are found. It is a home to those diverse Flora and Fauna. It is rich in diversity and it is also said that the type of creatures and plants that resides in the park cannot be found anywhere else in the world.
What is the water cycle of Gorongosa national park?
The park is surrounded by a large lake and the park is situated beneath the mountain that is approximately 2000 meters above the sea level.As it is home to the diverse flora and fauna, protecting and preserving them becomes the important issue.The trees on the the Mt. Gorongosa becomes an important alley in protecting them.It has been scientifically proven that if the trees on the Mt. Gorongosa are cut down, the water flow would drastically change and the mountain would become extremely flooded during winters and drought during dry season.
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There is iron in Hawaiian rocks. What does the presence of Iron tell scientists?
Answers
According to Humayun's hypothesis, chemical reactions between rock and liquid metal at the Earth's core-mantle border are what caused the extra iron to enter the mantle.
How iron is found in Hawaiian rocks?According to research by Professor Munir Humayun, the Earth's mantle beneath Hawaii has a higher iron content than other parts of the mantle. Hot plumes of solid rock from the core-mantle barrier or the deep mantle rise at rates of a few centimeters per year to form hotspot islands, such as Hawaii.
Seismologists have long hypothesized that the deep mantle of the Earth, which is the rocky layer 1,000 to 3,000 kilometers below the Hawaiian Islands, has a higher percentage of iron, but no one has ever exactly tested it, according to Humayun. One of the four primary elements that make up the mantle is iron.
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Please answer the picture
Answers
the tiles go into the sequence in that order.
first one is tile 2, second is tile 4, etc.
In flies, red eyes are dominant to brown eyes, while long wings are dominant to dumpy wings. You will cross a true-breeding fly with red eyes & dumpy wings to a true-breeding fly with brown eyes & long wings.
a. What genotype & phenotype do you expect in the F1 generation?
b. Draw a Punnett Square which represents the F2 generation & give phenotypic ratios.
Answers
The genotype in F1 generation would be produced as RrWW, RrWw and rrww and the phenotype would be red eyes with long wings in three organisms and one phenotype with brown eyes and dumpy wings.
RR are dominant to rr eyes. WW wings are dominant to ww wings. The cross takes places between true bleeding fly with red eyes & dumpy wings, i.e. RRww, to a true-breeding fly with brown eyes & long wings, i.e. rrWW. The phenotypes here would be produces in a ratio 3:1. And, three types of genotypes would be produced in F1 generation.
Refer the image attached for the reference of a Punnett square for the dihybrid cross of the given traits. The phenotypic ratio here would be produced as 9:3:3:1. The cross described here contains the inheritance of two traits, i.e., the eye color and the size of the wings. Hence, this is a dihybrid cross. One of the trait is dominant, while the other is recessive.
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a student studying the amount of soil erosion due to heavey rainfall in an area with many hills and valleys.in which of these locations in the area will the student most likely find the greatest amount of soil erosion
A.the hillsides
B.flowing water
C:a densely city in a valley, because removal of grass an trees to build structures leaves soil exposed to the flower water
D. A hillside where the trees have been cut down for lumber because there are fewer plants to slow the flow of water down the hillside
Answers
Answer:
B
Explanation:
Because flowing water causes erosion the fastest
How would an air mass that formed over the north pole differ from an air mass that formed over a warm
ocean?
Answers
An air mass that formed over the North Pole would differ from an air mass that formed over a warm ocean in several ways.
Air masses are large bodies of air with similar characteristics that form over a specific region of the Earth's surface and can travel long distances before encountering a different air mass that alters its characteristics. The characteristics of an air mass depend on the region over which it forms.
The air mass that forms over the North Pole would be cold and dry due to the absence of sunlight and the Arctic's high latitudes. Arctic air masses are characterized by a high pressure system that circulates air clockwise. This rotation traps cold air over the region and prevents it from mixing with the surrounding air masses.
The air mass that forms over a warm ocean would be warm and moist. The ocean surface warms the air above it, and the air acquires moisture through evaporation. The warm air then rises, causing low-pressure areas over the ocean and pulling in moisture-laden air from surrounding regions. This moist air mass travels over land, and its temperature decreases, causing it to lose its moisture content and form precipitation.
The moisture content in this air mass would be high, causing it to be humid. Air masses interact with each other and cause changes in weather patterns and climate. They also play a vital role in the Earth's energy balance and regulate temperature and precipitation patterns.
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According to economists, all humans have their own “rational self-interest.” What does this mean
Answers
The idea that people make decisions based on their own preferences and interests is known as rational self-interest, and it is a key tenet of economic theory.
When economists argue that humans are reasonable, what do they mean?The foundation of rational choice theory, an economics theory that holds that people always choose options that maximise their own value, is rational behaviour. Given the options available, these choices offer consumers the greatest benefit or enjoyment.
Why do people behave according to their own self-interest?Hedonistic psychological egoism is one answer to this topic that seems appealingly straightforward. According to the following text by the philosopher Jeremy Bentham from the 18th century, According to this perspective
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