Genetics Questions

A researcher is studying a population of organisms in which inbreeding occurs frequently. He knows that for two alleles, C and c, p and q are 0.75 and 0.25. If F in this population is 0.25, what will be the frequency of CChomozygotes in this population?a. 0.28b. 0.16c. 0.66d. 0.47

The process of _____ is the foundation for the _____, the constant rate of substitution of newly arising allelic variants for preexisting ones over long periods.a. positive evolution; gene flowb. negative evolution; molecular clockc. positive evolution; gene flowd. neutral evolution; molecular clock

SNPs within protein-coding regions are _____ if the two alleles encode different amino acids.a. nonsynonymousb. nonsensec. silentd. synonymous

A scientist is studying four haplotypes in mice: HR, Hr, hR, and hr. He determines these allele frequencies: pH= 0.7, ph = 0.3, pR = 0.4, and pr = 0.6. If the H and R loci are in linkage equilibrium, what will be the frequency of the Hr haplotype?a. 0.18b. 0.42c. 0.12d. 0.28

A man with blood type A (IAi) and a woman with blood type B (IBi) are having a child. What is the probability of the child having blood type A?1/41/22/33/4

Assume that in pea plants yellow (Y) and smooth (S) are dominant and unlinked (independent) traits. If a wrinkled, heterozygous yellow plant (Yyss) is mated with a plant that is heterozygous for both traits (YySs), what fraction of the offspring can be expected to be green and wrinkled?1/43/16/81/16 0

Assume that in moles a single gene controls color. Moles are either tan or gray. When a tan mole mates with another tan mole, all the offspring are tan. When a gray mole mates with either another gray mole or a tan mole, some of the litters are all gray and some litters are mixed, having gray and tan moles. Given these data, choose the most likely statement.The gray allele is dominant and all the tan moles are homozygousThe tan allele is dominant and all the tan moles are homozygousThe gray allele is dominant and all the gray moles are homozygousThe tan allele is dominant and all the gray moles are homozygous

The end-result of meiosis in a diploid cell is the formation of:Recombinant haploidsIdentical diploidsNeither, because diploid cells cannot perform mitosis

n a pathway controlling flower color, a functional copy of gene A is needed to produce enzyme A, which catalyzes the synthesis of red pigment. Without enzyme A, the flower only makes white pigment. A second gene, gene R, encodes a repressor protein that completely inhibits enzyme A. If a plant were to have the genotype Aarr, what color would the flower be? (Assume complete dominance for both genes)The flower would be white because the repressor protein is present and it is inhibiting enzyme AThe flower would be red because enzyme A is present and the repressor gene is brokenThe flower would be white because the genes for enzyme A and the repressor are broken

Suppose you perform a Chi-square test with a significance level Alpha = 0.05. If you obtain a P-value greater than 0.05You must accept the null hypothesisYou fail to reject the null hypothesisYou must accept the alternative hypothesis

The following pedigree shows an autosomal trait. Could this trait be dominant, recessive, or both?This trait is dominantThis trait is recessiveThis trait could be either dominant or recessive

Two true-breeding recessive mutant strains of fruit flies have black body color instead of the wild-type gray. When the two strains are crossed, all the F1 flies have wild-type body color. How can these data be interpreted?(a) Recombination occurred(b) Complementation occurred(c) The mutations involved affect two different genesd.) Both (b) and (c)

Which term refers to the proportion of variation of a trait (such as IQ) within the population that can be attributed to variation in gene expression?

Which of the following is the worst model organism for studying the general principles of genetics?Fruit FlyDogBaker's Yeast

Jon Snow is healthy. His father expresses an autosomal recessive trait. Jon marries Ygritte, a healthy woman whose parents were both carriers for the same recessive trait.What is the probability that Jon and Ygritte's child will express the trait?1/21/31/41/6

Suppose scientists identify a gene related to shyness in children, but not in all cases. They find that children with this gene were more likely to withdraw from social situations when subjected to the stress of moving to a new school than when they stayed in the same school. In contrast, children without the gene showed no difference in social withdrawal in the two types of situations. This example fits most closely to the concept of _____.

A child impresses her science teacher with her high interest in science and quick learning of science in the classroom. The teacher chooses her as one of only two children from her class that will prepare an exhibit for the district-wide science fair. This most likely represents _____.

When performing the cross AaBb x AaBb, what is the expected phenotypic ratio? (Assume the simplest scenario, that is, independent assortment, complete dominance, and no epistasis.)1:2:19:4:1:19:3:3:113:3

A child who is adopted by parents who are not frequent readers keeps showing an interest in reading. Eventually, the adoptive parents respond by getting the child a library card and reading along with the child to help him. This is an example of one factor that has been proposed as a limitation to the behavior genetics approach. The factor that best fits here is __________.

Which statement is most accurate for the trait shown in the pedigree?he trait must be recessive sex-linkedThe trait must be dominantThe trait could not be sex-linkedThe trait must be recessive, but it could be autosomal or sex-linkedThe trait could be dominant or recessive, autosomal or sex-linked