A guinea pig heterozygous for both traits mated with a homozygous recessive guinea pig. What is the probability of having offspring with at least one dominant trait? a. 0.50 b. 1.0 c. 0.25 d. 0.00 e. 0.75
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A guinea pig heterozygous for both traits mated with a homozygous recessive guinea pig. What is the probability of having offspring with at least one dominant trait?
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- A population of mice contains 20 animals Show work here: with white tails and 30 animals with grey tails. Grey tails are the dominant trait. a. What is the frequency of the white allele? b. What is the frequency of the grey allele? c. What is the frequency of heterozygotes? d. What is the frequency of mice homozygous for the grey allele?Suppose that extra fingers and toes are caused by a recessive trait but only appears in 25% of the homozygous recessive individuals. If two heterozygotes conceive a child, what is the probability that this child will have extra fingers? a. 1/16 b. 1/4 c. 1/3 d. 1/8 e. 1/2In a population of mountain lions, 9% of the individuals suffer from a disease caused by a recessive allele (aa). A) Calculate the frequency of both the dominant and recessive alleles. B) What is the percentage of homozygous dominant individuals and what is the percentage of heterozygous individuals in the population?
- 1b.) Which is NOT commonly an effect of inbreeding in a population? a. an increase in the frequency of homozygous dominant individuals b. an increase in the frequency of homozygous recessive individuals c. an increase in the frequency of recessive genetic diseases d. better health and fertility of inbreds lines compared to lines that are not inbred.in a herd of longhorn cattle the mean horn length is 52cm and h² is 0.2 . predict the mean horn length if cattle with horn of 61cm are interbredA mountain region has a population of 5,000 mountain goats. You score these animals for the R locus and find that this locus has two alleles, R (dominant) and r (recessive). 3200 individuals are homozygous dominant, 1,600 are heterozygous, and 200 are homozygous recessive. a) Calculate the allele frequencies for this population. Show your work. b) Calculate the observed genotypic frequencies for this population. Show your work. c) Calculate the expected genotype frequencies if the population is in Hardy-Weinberg equilibrium. Show your work. d) Does this population appear to be at H-W equilibrium? Why or why not? (You do not need to analyze this statistically).
- If blonde hair color is a recessive trait and one parent is heterozygous for the trait and the other parent is heterozygous for the trait, what are the chances that their offspring will have blonde hair?A. 25% (one in four)B 50% (two in four)C. 75% (three in four)D. 100% (four in four) Provide explanation or solutionE13. An animal breeder had a herd of sheep with a mean weight of 254pounds at 3 years of age. He chose animals with a mean weight of281 pounds as parents for the next generation. When these offspringreached 3 years of age, their mean weight was 269 pounds.A. Calculate the narrow-sense heritability for weight in this herd.B. Using the heritability value that you calculated in part A, whatmean weight would you have to choose for the parents to getoffspring that weigh 275 pounds on average (at 3 years of age)?Calculate r0, r1, r2 and the coefficient of kinship F between: A) A grandparent and their grandchild B) A great grandparent and their great grandchild C) Full siblings D) A great aunt and her grand nephew (your great aunt = your parent’s aunt)
- A population of birds may have red feathers or orange feathers. Red feathered birds have the genotype RR or Rr. Orange feathered birds have the genotype rr. The frequency of the RR genotype is .46 a. What is the frequency of heterozygous birds? B. What is the frequency of the R allele ? C. What is the frequency of r allele?A certain population has two fur color genes: B (black, dominant) and b (brown, recessive). Suppose you look at a population that is 25% brown and 75% black. Estimate the percentages in the gene pool that are B and b.In one species of finch, there are alleles for yellow color and red color, but neither of these alleles is dominant over the other. When a finch of this species has both of these alleles, its color is orange. If an orange finch is bred with a yellow finch, the phenotypes of the offspring will occur in what ratio? (Hint: Construct a Punnett square to help you answer this question.) A 1:1 ratio of yellow and orange A 1:2:1 ratio of yellow, orange, and red A 1:3 ratio of red and yellow A 1:1 ratio of orange and red In this species of finch, the alleles for color are an example of codominace or imcomplete dominance?