Homework Answers
The ability to taste the chemical phenylthiocarbamide (PTC) results from a dominant allele (T) and not...
The ability to taste the chemical phenylthiocarbamide (PTC) results from a dominant allele (T) and not being able to taste PTC is the result of having two recessive alleles (t). The ability to roll one's tongue is the result of a dominant allele on a second gene (R). Consider that two parents who are both taster, rollers have a child that is a non-taster, non-roller. What is the probability that their next child will have the same phenotype as the...
2. Ability to taste phenylthiocarbamide (PTC) is mostly determined by the gene PTC. The letters T...
2. Ability to taste phenylthiocarbamide (PTC) is mostly determined by the gene PTC. The letters T and t are used here to simplify analysis. TT individuals taste a strong bitter taste; Tt people experience a slightly bitter taste: tt individuals taste nothing. A fifth-grade class of 20 students tastes PTC that has been applied to small pieces of paper, rating the experience as “very yucky” (TT), “I can taste it” (Tt), and “I can’t taste it” (tt). For HW, the...
The ability to taste the bitter compound phenylthiocarbamide (PTC) is an autosomal dominant trait. The inability...
The ability to taste the bitter compound phenylthiocarbamide (PTC) is an autosomal dominant trait. The inability to taste PTC is a recessive condition. In a sample of 500 people, 391 have the ability to taste PTC and 109 do not. Calculate the frequency of: A. the recessive allele. Express your answer using two decimal places. B.the dominant allele. Express your answer using two decimal places. C.the homozygous dominant genotype. Express your answer using two decimal places. D.the homozygous recessive genotype....
5. Certain people are able to taste the chemical phenylthiocarbamide (PTC) when it is present in...
5. Certain people are able to taste the chemical phenylthiocarbamide (PTC) when it is present in wet filter paper. These people are called 'tasters'. Others are unable to detect PTC and have the 'nontaster' phenotype. PTC tasting is an example of variation in sensory perception, and the genetic basis is thought to be rather simple. The ability to taste PTC is attributed to a dominant allele, denoted T, located on chromosome 7. The recessive allele is designated t. From analysis...
The ability to roll one’s tongue(R) is dominant over non-rolling (r). The ability to taste PTC...
The ability to roll one’s tongue(R) is dominant over non-rolling (r). The ability to taste PTC (T) is dominant over non-taster (t). Suppose a woman who is both homozygous tongue-roller and a non-taster marries a man who is heterozygous tongue-roller and is a PTC- taster, and have three children: a homozygous tongue-roller who is also a PTC- taster, a heterozygous tongue-roller who is also a taster, and a heterozygous tongue-roller who is a non-taster. a.If these parents would have a...
The compound phenylthiocarbamide (PTC) tastes very bitter to most people. The inability to taste PTC is...
The compound phenylthiocarbamide (PTC) tastes very bitter to most people. The inability to taste PTC is controlled by a single autosomal recessive allele. In the American white population, about 70% can taste PTC while 30% cannot (are non-tasters). Estimate the frequencies of the Taster (T) and non-taster (t) alleles in this population. How common are carriers (those carrying the allele, but not displaying the phenotype) of the non-taster allele? What assumption did you make to carry out your calculations how...
PTC is a substance that has a strong bitter taste for some people and is tasteless...
PTC is a substance that has a strong bitter taste for some people and is tasteless for others. The ability to taste PTC is inherited. About 75% of Italians can taste PTC, for example. You want to estimate the proportion of Americans with at least one Italian grandparent who can taste PTC. Starting with the 75% estimate for Italians, how large a sample must you collect in order to estimate the proportion of PTC tasters within ±0.06 with 90 %...
Lets let R represents tongue-rolling, r represent a non -roller, T represent ability to taste PTC,...
Lets let R represents tongue-rolling, r represent a non -roller, T represent ability to taste PTC, and t represent non tasting. Suppose a women who is both a heterozygous tongue roller and a non PTC taster marries a man who is a heterozygous tongue roller and is a homozygous PTC taster. What will their children's phenotypes ratio be?
If 9% of the population cannot taste PTC (a recessive trait), what is the frequency of...
If 9% of the population cannot taste PTC (a recessive trait), what is the frequency of the non-taster allele in the population? What is the frequency of the taster allele? What percentage of the population will be homozygous dominant? What percentage of the population will be heterozygous?
6. About 70% of Americans get a bitter taste from the substance called phenylthiocarbamide (PTC). It...
6. About 70% of Americans get a bitter taste from the substance called phenylthiocarbamide (PTC). It is tasteless to the rest. The "taster" allele is dominant to non-taster. Also, normal skin pigmentation is dominant to albino. A normally pigmented woman who is taste-blind for PTC has an albino-taster father. She marries an albino man who is a taster, though the man's mother is a non-taster. 1 pt A. What are the genotypes of the woman and man? B. What phenotypes...
5. Certain people are able to taste the chemical phenylthiocarbamide (PTC) when it is present in wet filter paper. These people are called 'tasters'. Others are unable to detect PTC and have the 'nontaster' phenotype. PTC tasting is an example of variation in sensory perception, and the genetic basis is thought to be rather simple. The ability to taste PTC is attributed to a dominant allele, denoted T, located on chromosome 7. The recessive allele is designated t. From analysis...
If 9% of the population cannot taste PTC (a recessive trait), what is the frequency of the non-taster allele in the population? What is the frequency of the taster allele? What percentage of the population will be homozygous dominant? What percentage of the population will be heterozygous?
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