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Transcript
Bio 130 – Quiz April 4 Q. 1 – T.H. Morgan and his colleagues worked out a set of symbols to represent fly genotypes. Which of the following are representative? A. B. C. D. E. AaBb × AaBb 46, XY or 46, XX vg+vgse+se × vgvgsese +2 × +3 IA IB × IA IA Q. 2 - In some Drosophila species there are genes on the Y chromosome that do not occur on the X chromosome. Imagine that a mutation of one gene on the Y chromosome reduces the size by half of individuals with the mutation. Which of the following statements is accurate with regard to this situation? A. This mutation occurs in all offspring of a male with the mutation. B. This mutation occurs in all male but no female offspring of a male with the mutation. C. This mutation occurs in all offspring of a female with the mutation. D. This mutation occurs in all male but no female offspring of a female with the mutation. E. This mutation occurs in all offspring of both males and females with the mutation. Q. 3 - In cocker spaniels solid coat color is dominant over spotted coat color. If two heterozygous dogs were crossed to each other, what would be the probability of having a litter of 3 pups, 2 with solid coats and one with a spotted coat? A. B. C. D. E. ¾ 3/8 9/16 9/32 9/64 Q. 4 – Two human parents with normal skin pigmentation have an albino child. What is the probability that their next child will be an albino too? A. B. C. D. E. ½ ¼ 1/8 1/16 1