Genetics Questions

Two true-breeding mutant strains of Drosophila 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?Recombination occurredComplementation occurredThe mutations involved are on two different genesBoth B and C

Which of the following is true about the SRY gene in humans?It is present on the X chromosomeIt is present on the Y chromosomeIt is present on an autosome

Human males and fruit fly males are said to be ____ for genes on the X chromosome.homozygousheterozygoushomogameticheterogametichemizygous

Which of the following karyotypes represents a female bird?ZZXYZWXX

Could this trait be autosomal recessive?

X-linked traits are only expressed in males, not in females.TrueFalse

Suppose you cross two heterozygous parents (Aa x Aa). After analyzing a large number of viable offspring from this cross, you discover that all the offspring is either AA or Aa. What is the best interpretation of this finding?The A allele is incompletely dominant to aThe a allele is recessive epistatic to the A alleleGene A is a lethal geneGene A is an essential gene

According to the null hypothesis, the offspring of a cross is expected to exhibit a 1:1 phenotypic ratio for red vs. white flower color. Three different researchers attempt to test this hypothesis, and their results are shown below. Which dataset will give a smaller Chi-square value?8 reds : 10 whites80 reds : 100 whites800 reds : 1000 whitesAll datasets will give the same Chi-square value

Epistasis refers to the phenomenon where the functional state of a gene influences the expression of another gene(s).TrueFalse

Why do people suspect that Mendel's monohybrid cross data were biased (the 3:1 phenotypic ratio in F2)?(a) Mendel's Chi-square values are too low(b) Mendel's Chi-square values are too high(c) Mendel's P-values are too low(d) Mendel's P-values are too highBoth (a) and (d)Both (b) and (c)

In the diagram above, gene A and gene B make enzymes that are capable of synthesizing purple pigment independent of each other. In other words, each of the two enzymes is fully sufficient to produce purple color. Flower 1 with genotype Aa Bb is crossed with Flower 2 with genotype aa bb. Assuming complete dominance, what proportion of the offspring is expected to be purple? (Hint: figure out what proportion will be white, then subtract that from 100%)3/161/41/23/4

A man with blood type A (IAi) is heterozygous for the Bombay gene (Hh). He marries a woman with blood type B (IBi) who is also Hh. What is the probability of them having a child with blood type AB? 3/161/43/42/3

If a die is fair and has 6 faces, what is the probability you will roll either a 2 or a 4 or a 6?1/2163/181/61/3 1/2

For a gene with complete dominance, the recessive allele has no effect on the phenotype of a heterozygous organism.TrueFalse

What is the sex-determining system in humans?XY systemZW systemhaplodiploidy

Suppose you are conducting a Chi-square test to check if a coin is fair. You flip the coin 11 times. What is the expected number of heads?55.56

Suppose you conduct a Chi-square test and obtain a P-value of 0.02. You conclude that the null hypothesis cannot be rejected. This is becauseThe degrees of freedom in your test are greater than 10The significance level Alpha in your test is set to less than 0.02The Chi-square value is too small

Suppose you perform a Chi-square test and find a P-value of 0.01. According to the null hypothesis, what is the probability that the Chi-square value should be smaller than yours?0.000.01 0.991.00

Suppose you analyze the F2 generation of a monohybrid cross. You obtain 85 specimens with the dominant phenotype and 30 specimens with the recessive phenotype. Given these data, what null hypothesis should be rejected at the significance level Alpha = 0.05?Dominant:Recessive = 2:1Dominant:Recessive = 3:1Both (a) and (b)Neither (a) nor (b)

Joey Tribbiani conducts a Chi-square test and obtains a Chi-square value of 4.0. He sets the significance level Alpha at 0.05. When he consults the Chi-square table, he concludes that the null hypothesis cannot be rejected. How many degrees of freedom are there in Joey Tribbiani's test?(a) 1 (b) 2(c) Less than 1Could be both (b) and (c)