Sample A has been allowed to breed randomly for many generations. At a particular gene locus, there are two alleles, and one is dominant to the other. After several generations, 64% of the animals have the phenotype associated with the dominant allele. Population A is in Hardy-Weinberg Equilibrium. a) In Colony A, what is the estimated frequency of the recessive allele and heterozygous genotype?
Sample A has been allowed to breed randomly for many generations. At a particular gene locus, there are two alleles, and one is dominant to the other. After several generations, 64% of the animals have the
a) In Colony A, what is the estimated frequency of the recessive allele and heterozygous genotype?
Sample B has been studied for many generations. The slope of the regression line describing the relationship between the number of whiskers in an offspring and the average number of whiskers of both parents is 0.50.
b)What is the heritability (h2) of abdominal bristle number in Sample B?
c) Suppose that the mean whisker number in Sample B is 26 and suppose that the researcher chooses rats for breeding such that the mean whisker number of breeding individuals is 36. What would you expect the mean number of whiskers in the offspring of these breeding individuals to be? Why?
d) Precisely why aren’t the offspring in Sample B expected to have an average of 36 whiskers?
Sample C contains 1,000 ragoons. Genetic tests show that there are two alleles for a trait—A and B, and that 160 have the genotype AA, 480 have the genotype AB, and 360 have the genotype BB. It is not known whether the population is in Hardy-Weinberg Equilibrium.
e) What is the frequency of the A allele and B allele in Sample C?
f) Is the population in Hardy-Weinberg equilibrium at this locus? How do you know? Be specific!
Sample D contains 5 males and 95 females. Genetic tests show that the heterozygosity in the colony is 0.05 at this moment.
f)) What is the effective
g) How will the heterozygosity of Colony D change in one generation due to genetic drift?
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