Ch. 3 HW - Ch. 3 HW MCQs: 1) A recessive allele in tigers...

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Ch. 3 HW MCQs : 1) A recessive allele in tigers causes the white tiger. If two normally pigmented tigers are mated and produce a white offspring, what percentage of their remaining offspring would be expected to have normal pigmentation? A) 50% B) 75% C) About 66% D) About 90% E) 25% 2) Polydactyly is expressed when an individual has extra fingers/ toes. Having extra digits is caused by a dominant allele. If a man with polydactyly marries a woman with normal number of digits and has one son with normal hands and feet and one with extra digits; what is the probability that their next child will have polydactyly? A) 1/32 B) 1/8 C) ½ D) ¾ E) 7/16 3) Tightly curled hair is caused by a dominant gene in humans. If a heterozygous curly-haired person marries a person with straight hair; what fraction of their offspring would be expected to have straight hair? A) ½ straight B) ¼ curly C) 100% straight D) ¾ curly E) None 4) What type of genotypic and phenotypic ratios are likely to occur in crosses when dealing with a single gene pair where all the genotypic combinations are of equal viability? A) 9:3:3:1, 27:9:9:9:3:3:3:1 B) 1:2:1, 3:1 C) 1:4:6:4:1, 1:1:1:1 D) 12:3:1, 9:7 E) 2:3, 1:2
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5) Assume that a black guinea pig crossed with an albino guinea pig produced five black offspring. When the albino was crossed with a second black one, 4 black and 3 albino offspring were produced. What genetic explanation would apply to these data?
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Ch. 3 HW - Ch. 3 HW MCQs: 1) A recessive allele in tigers...

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