When it comes to hair texture, human hair can be very strait, very curly, or nearly anywhere in between (slightly wavy, very wavy etc.) Scientists have discovered several different gene pairs at several different chromosomal locations that influence hair texture in humans, therefore human hair texture can be described as a _______ trait. In addition to the many gene pairs that can influence a person's hair texture, the environment can influence a person's hair texture as well. For example a person whose hair is slightly wavy on a dry day, might be more curly or frizzy hair on a humid day. Since hair texture is influenced by the environment as well as genes it is also considered a ___________ trait.
Answers
Answer:
polygenic; multifactorial
Explanation:
A polygenic trait can be defined as any phenotypic feature of an organism that is controlled by the action of several polymorphic genes which interact with the environment to produce a given phenotype (i.e., they are multifactorial traits). The polygenic traits are controlled by many genes localized in different regions of the genome (i.e., loci) and exhibit a continuous range of variation, where each genomic region associated with the variation of the trait is called Quantitative Trait Locus (QTL). Some examples of polygenic/quantitative traits include, among others, height, hair color, weight, blood pressure, etc.
Related Questions
botulinum toxin and tetanus toxin both interfere with the release of neurotransmitters, but botulinum toxin causes _____, whereas tetanus toxin causes _____
Answers
Botulinum toxin and tetanus toxin both interfere with the release of neurotransmitters, but botulinum toxin causes botulism, whereas tetanus toxin causes spastic contractions of the muscles.
Botulinum toxin, produced by the bacteria Clostridium botulinum, is the most potent neurotoxin known, and is responsible for the disease botulism. Botulinum toxin works by blocking the release of the neurotransmitter acetylcholine, which is responsible for muscle movement.
As a result, botulinum toxin causes paralysis of the muscles. Tetanus toxin, produced by the bacteria Clostridium tetani, also blocks the release of acetylcholine, but instead of causing paralysis, it causes spastic contractions of the muscles. The spasms of tetanus are much more violent than the paralysis caused by botulinum toxin, and can be potentially fatal.
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Each member of a family of 5 has eye color that is different shade of brown. The fathers eye are a very dark brown, while the mothers are a shade of golden brown. The 3 children have shades ranging from light to dark brown. What type of inheritance does this family's eye colors reflect?
Answers
Answer:
It is codorminace.
Explanation:
Codorminace is a type of inheritance relationship in which the offspring receive one allele or gene from the father and another gene from the mother and the two allele inherited are not receive rather they are dorminant in the offspring or they are not masked but they are both expressed in the offspring.
From the question, it could be discovered that the offsprings inherit dark brown gene from the father and golden brown from the mother , the two are expressed at they same time and that is why the children shades from light to dark brown.
Some insect species are resistant to pesticides. Which statement BEST explains this phenomenon? Natural selection resulted in an unfavorable variation for the insects. Because their survival depended on it, the insects developed variations that made them resistant to poisons. Random variation in the population led to a population with a favorable adaptation. Some of the insects became instantly immune when the poisons were introduced into their environment
Answers
Answer:
Random variation in the population led to a population with a favorable adaptation
Explanation:
Insecticide resistance can be defined as an evolutionary process that causes a decreased susceptibility of an insect population to a particular insecticide. The evolution of the insecticide resistance occurs by the mechanism of natural selection, where most resistant insects survive and thus pass on their acquired heritable resistance to their offspring. Moreover, the evolutionary origins of the resistance trait may be associated with different processes: 1-de novo mutations (i.e., the emergence of beneficial genetic changes in the population), 2-standing variation in the original population which is selected under the selective agent (in this case, the pesticide), 3-migration of resistant specimens originally resistant to the pesticide, and 4-even interspecific transfer (i.e., horizontal transfer between different species).
How might biodiversity be important to an ecosystem’s health and stability?
Answers
Ecosystems with higher biodiversity are more stable as they can easily adjust to changes. They also have fewer species that depend on just one another for food, shelter and maintaining their environment
Ocho vw from the main vide
Data
Activity 1
1. Ddel produces sticky ends. For the wild-type beta-globin sequence, how many DNA fragments are present in the following digestion by Dder
2. For the mutant beta-globin sequence, how many DNA fragments are present in the following digestion by Ddel? If the number of fragments is different than that of the wild- type beta-globin sequence following Ddel digestion, explain why.
3. Count the number of base pairs for each fragment. Remember that a base pair includes two bound nucleotides. If a base is not paired because of a sticky end, do not count it. This count determines the approximate size of the fragment.
a. For the Ddel-digested, wild-type beta-globin sequence, how many nucleotides are in each fragment?
b. For the Ddel-digested, mutant beta-globin sequence, how many nucleotides are in each fragment?
4. On the basis of fragment size, how can the difference between the wild-type sequence and the homozygous mutant sequence be recognized?
5. What fragments would be present following Ddel digestion of a sample from someone with a heterozygous beta-globin genotype?
6. On the gel diagram, indicate where the DNA fragment(s) in the Ddel-digested beta-globin samples would be expected to run. Draw a line for each band. Use the DNA marker with known base pair sizes to orient the bands. A Ddel-digested sample from a newborn with an unknown beta-globin genotype is drawn in the last lane.
Answers
1. DdeI is a restriction enzyme that recognizes the sequence 5′-CTNAG-3′. It cleaves the double-stranded DNA within its recognition sequence, leaving a single-stranded overhang (sticky end) at each end. In the given wild-type beta-globin sequence (5' CTG ACT CCT GAG 3'), there is only one recognition sequence of DdeI. It is CTGA CTC, which is present between the seventh and eighth base pairs. The recognition sequence has five nucleotides. DdeI will cut the DNA at this site, producing two fragments. Therefore, the Ddel digestion of the wild-type beta-globin sequence produces two fragments: 5'-CTGACTC-3' and 5'-CTGGAG-3'.
2. In the mutant beta-globin sequence (5' CTG ACT CCT GTG 3'), the recognition site for DdeI is changed by one nucleotide from 5'-CTGA CTC-3' to 5'-CTG ACC-3'. The mutated sequence does not contain a recognition sequence for DdeI, so there will be no fragments produced by digestion.
3. To calculate the number of nucleotides in each fragment, you need to count the number of base pairs in each fragment. A base pair consists of two nucleotides. For the DdeI-digested wild-type beta-globin sequence, there are two fragments. The first fragment is 8 base pairs long, and the second fragment is 1 base pair long. So, for the digested fragment there are 19 nucleotides in one fragment and 5 in the other fragment.
5' CTG ACT CC T GAG 3'
3' GAC TGA GGA CT C 5'
The mutant fragment has no restriction site so there are 12 base pair and 24 nucleotides.
4. The difference between the wild-type and mutant beta-globin sequences can be recognized by the number of fragments produced by DdeI digestion. The wild-type sequence produces two fragments, while the mutant sequence does not produce any fragments Each fragment migrates at a different speed, placing the fragments at different distances.
5. If someone has a heterozygous beta-globin genotype, one of the chromosomes will be wild-type, and the other will be mutant. DdeI digestion of this sample will produce three fragments: two fragments from the wild-type chromosome and no fragments from the mutant chromosome. The sizes of the fragments will be the same as those produced from the wild-type sequence.
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Which operon displays both positive and negative gene regulation? a) Trp operon b) Lac operon c) Both Trp and Lac operons d) None of the above
Answers
The operon that displays both positive and negative gene regulation is the Lac operon. This operon is regulated by the presence or absence of lactose and glucose in the environment.
When lactose is present, it binds to the repressor protein and causes it to detach from the operator site, allowing for transcription of the genes. This is an example of positive regulation. On the other hand, when glucose is present, it inhibits the production of cyclic AMP (cAMP), which is required for the binding of the activator protein to the promoter region.
This is an example of negative regulation. Therefore, the correct answer is b) Lac operon.
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ii. Describe the relationship between the amount of rainfall and the amount of sediment in runoff.
Answers
The relationship between the amount of rainfall and the amount of sediment in runoff is that it is generally inversely proportional, meaning that as one increases, the other decreases.
What is the relationship about?During periods of low rainfall, the amount of sediment in runoff tends to be high because there is less water to dilute it. When it rains, the water can erode soil, rock, and other materials, causing them to be carried away as sediment in the runoff.
However, if there is not enough water, the sediment will not be washed away and will accumulate in one place.
On the other hand, during periods of high rainfall, the amount of sediment in runoff tends to be low because there is more water to dilute it. The heavy rain can cause the sediment to be washed away, transported, and deposited downstream. Additionally, the
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3. Electromagnetic energy is unique because it travels in the form of
OA. radiation waves.
OB. convection.
C. sound.
OD. conduction.
Answers
carry electrical charges at opposite poles.
A . nonpolar bonds
B. polar bonds
C. hydroelectric bonds
D. lonic bonds
Answers
Answer:d
Explanation:
What results when rocks come in contact with molten rocks (magma/lava) such as those in an igneous intrusion
?
Answers
HELP ASAP PLS!!! Which of the following statements is correct about nonsexual touch as it relates to older adults?
O The main benefit of nonsexual touch is meeting the need for intimacy.
The main benefit of nonsexual touch is alleviating gastroesophageal reflux.
The main benefit of nonsexual touch is exercising joints and muscles.
The main benefit of nonsexual touch is to the circulatory system.
Answers
The main benefit of nonsexual touch is meeting the need for intimacy.
What is non sexual touch?Non-sexual touch is therapeutic, relaxing, and crucial for connection, whether it is sexual or not. Non-sexual touch may be discouraged in contemporary American culture.
Non-sexual, acceptable touch can help people become less emotionally reactive while fostering warmth and connection in relationships.
Non-sexual touch offers happiness, tranquillity, and physical health. which is a fairytale conclusion. In our highly independent world, non-sexual touch is a requirement that is frequently disregarded.
Therefore, The main benefit of nonsexual touch is meeting the need for intimacy.
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Manhattan is approximately 34 square miles. what is the density of coffee shops per square mile?
there are 240.3 coffee stops in total
Answers
To find the density of coffee shops per square mile in Manhattan, we need to divide the total number of coffee shops by the total square miles of the borough.
Therefore, the density of coffee shops per square mile in Manhattan is approximately 7.06 coffee shops per square mile (240.3 coffee shops / 34 square miles = 7.06 coffee shops per square mile). Based on the information provided, Manhattan has an area of approximately 34 square miles and there are 240.3 coffee shops in total. To calculate the density of coffee shops per square mile, you can use the formula:
Density = Total number of coffee shops / Area in square miles
Density = 240.3 coffee shops / 34 square miles
Density ≈ 7.07 coffee shops per square mile
So, the density of coffee shops in Manhattan is approximately 7.07 per square mile.
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Describe the difference between genetic drift and gene flow.
Answers
Answer:
Gene flow is the process of alleles going from one population to another while genetic drift is the alteration of allele frequency in a gene pool. The cause of gene flow is migration or geographical isolation while that of genetic drift is random sampling with two mechanisms
Explanation:
Would the construction of this master-planned community impact the carrying capacity of the state’s ecosystem?
Answers
Answer:
Are you against or with?
Explanation:
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Which of the following methods explains how the atmosphere close to the ground warms up due to land and air particles bouncing off one another and transferring heat?
Composition
Conduction
Convection
Radiation
Answers
Radiation....... I think
Answer:
conduction I just did the quiz
Explanation:
How do plants use carbon dioxide? A. To build proteins. B. They store it as fuel in limestone deposits. C. To produce sugars. D. They release it as waste.
Answers
Answer:
C) To produce sugars
Explanation:
Through photosynthesis, plants convert carbon dioxide and water into sugar.
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method of providing water to plants other than by precipitation
Answers
The method of providing water to plants other than by precipitation is irrigation.
Irrigation is the process of supplying water to plants using artificial methods such as drip systems, sprinklers, and flood irrigation to meet their water requirements. This method is used in agriculture and gardening to ensure that plants receive an adequate amount of water, especially in areas where natural precipitation is insufficient or inconsistent.
Irrigation can be carried out using various techniques, such as drip irrigation, sprinkler systems, or surface irrigation, depending on the specific needs of the plants and the resources available.
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Question 6
Green peas are dominant to yellow peas. A yellow pea plant crosses with a green pea plant and 100% of the offspring
are green. What must be the genotypes of the parents?
A. Gg x Gg
B. GG x gg
C. gg x gg
D. Gg x gg
Answers
50% of the offspring will have a Gg phenotype and 50% will have gg phenotype.
What are genotypes?The type of variant present at a specific locus (i.e., region) in the genome is scored by what is known as a genotype. Symbols can be used to symbolise it. For illustration, BB, Bb, and bb could be used to denote a certain gene variant. The universally compatible genotype, genotype AA, ensures that no matter who they mate with, they will never give birth to a child who has sickle cell disease. The compatible and incompatible genotypes are listed below: AA and AA are complementary. AA and AS are complementary. AA and SS go together.The genotypes that could result from the cross are green and yellow.Gg and gg phenotypes will each make up half of the offspring.To learn more about genotypes refer to:
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How many cells make up a typical angiosperm megagametophyte?
Answers
Seven cells, although they can have as few as four cells, the majority of angiosperm megagametophytes contain just seven cells. There is just one egg cell per megagametophyte, and the archegonium is absent.
The megagametophyte of angiosperms, sometimes referred to as "flowering plants," generally has eight nuclei and seven cells. Angiosperms and gymnosperms reproduce via heterosporous. Heterosporous refers to a pair of gametes that are distinct from one another in both appearance and function, such as an egg and a pollen particle. The bigger form, the egg, is known as the megagametophyte, whereas the smaller form (in the example, the pollen), is known as the microgametophyte. The two come together and create a seed that will grow.
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A person's thyroid is not functioning properly. What symptoms is the person likely to show?
Answers
Answer:hello
Explanation:
the answer wloud likey be Tiredness, fatigue, weight gain, depression and constipation because your thyroid is likey connecing all of your body
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What does epithelial tissue do? a. fills internal spaces, provides structural support, stores energy b. contracts to produce movement, includes skeletal muscle, cardiac muscle, and smooth muscle c. covers exposed surfaces, lines internal passageways and chambers, forms secretory glands d. conducts electrical impulses, carries information
Answers
The things that epithelial tissues do are covers exposed surfaces, lines internal passageways and chambers, forms secretory glands (Option C).
Epithelial tissue is a type of tissue that is composed of one or more layers of cells that cover the body surfaces or line the cavities of the body. The cells in epithelial tissue are closely packed and form continuous sheets that can vary in thickness from a single layer of cells to many layers of cells.
The functions of epithelial tissue are:
It covers exposed surfaces and protects the body from physical and chemical damage.It lines internal passageways and chambers and protects the body from invading microorganisms.It forms secretory glands that secrete mucus, sweat, enzymes, and hormones.Hence, the correct answer is Option C.
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Jayden used the multiplication table below to determine that 8:14 is equivalent to 24:42
Answers
Answer: They are both equivalent.
I don't see a multiplication table down below, but I get what you're trying to answer.
Explanation:
8:14 and 24:42 are both the same as 8/14 and 24/42. Multiply both the denominator and numerator by 3 since that's how you solve equivalent ratios. If you try 1 and 2, they will not work. 8*3=24 and 14*3= 42, therefore 8:14.
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Why is it important that so many animals exist, and why do scientists spend so much time trying to discover them?
Answers
Answer:
Because they are all under the world so they have take time to understand them.
which of the following best describes the building performance issue or issues that arise because of over-framing?
Answers
The building performance issue that arises because of over-framing is described as follows: C. It is increasingly difficult to install mechanicals and insulation effectively, and windows are more likely to bind and subfloors to squeak.
Over-framing refers to the excessive use of framing members in a building, which can lead to several challenges. When there is an excess of framing, it becomes more challenging to properly install mechanical systems (such as plumbing, electrical, and HVAC) and insulation. The limited space caused by over-framing can restrict access and make it difficult to route and install these systems effectively.
Furthermore, windows can be affected by over-framing, as the excessive framing can cause binding and interfere with their proper functioning. Subfloors can also experience issues like squeaking due to the excessive framing.
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The complete question is:
Which of the following best describes the building performance issue or issues that arise because of over-framing?
A. Over-framing causes no building performance issues; in fact, the more framing, the better the home.
B. Over-framing increases the amount of air infiltration.
C. It is increasingly difficult to install mechanicals and insulation effectively, and windows are more likely to bind and subfloors to squeak.
D. Over-framing increases the potential for mold growth.
there were 100,000 cattle in just one feedlot down here. how much corn was grown for them?
Answers
It is not possible to determine the amount of corn grown specifically for the 100,000 cattle in one feedlot without additional information. There are several factors that determine the amount of corn needed to feed cattle in a feedlot, including:
Feed Conversion Ratio (FCR): This refers to the amount of feed required to produce a unit of weight gain in cattle. The FCR varies depending on the breed, age, and weight of the cattle, as well as the type of feed used.
Feed Requirements: The feed requirements for cattle also vary based on their age, weight, and breed. Lighter and younger cattle generally require less feed compared to older and heavier cattle.
Feed Composition: The composition of the feed also affects the amount of corn required to feed the cattle. Cattle feed typically includes corn, soybean meal, and other additives, and the proportion of each ingredient affects the amount of feed required.
Therefore, without knowing the FCR, feed requirements, and feed composition, it is not possible to determine the amount of corn grown for the 100,000 cattle in the feedlot.
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in which region of the world mudflows are more common
Answers
Answer:
Usually in mountainous areas.
Which type of selection leads to increased phenotypic and genetic varialion?
directional selection
disruptive selection
stabilizing selection
species selection
Answers
Based on the data provided for the three stream assessment components, is the overall health and stability of the Little Gunpowder River good, fair, marginal, or poor? Explain how water quality results, physical characteristics, and the stream’s biodiversity and presence of certain macroinvertebrate species support your overall stream health rating.
Answers
Answer:
Macroinvertebrates serve several important functions within the aquatic environment:
They provide a valuable "cleaning" service by scavenging dead or decaying bacteria, plants, and animals, which helps recycle nutrients back into the system.
They are an important food for fish, birds, amphibians and reptiles.
Explanation:
the list could go on and on.
pharmacodynamics involves which of the following? a) information about main mechanisms of drug absorption b) information about unwanted effects c) information about biological barriers d) information about excretion of a drug from the organism
Answers
Pharmacodynamics involves information about unwanted effects.
Pharmacodynamics is the study of the biochemical, physiological, and molecular effects of medications on the body and involves receptor binding (including receptor sensitivity), post-receptor effects, and chemical interactions. The phrase "what a drug does to the body" is commonly used to describe it.
The relationship between dose and response, or the effects of the medicine, is better understood by combining pharmacodynamics with pharmacokinetics (what the body does to a drug or the fate of a drug within the body).
The pharmacologic response is based on how well the medicine binds to its intended target. The amount of the medicine present at the receptor site affects how the drug works.
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How is phosphorus different from the other nutrient cycles?
Answers
There’s an explanation. I hope this helps!