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Unformatted text preview: Biol 100 Genetics Problems: 1. If 50% of the offspring from a test cross display the recessive phenotype, then the unknown parent possesses A. a homozygous genotype B. a heterozygous genotype C. identical alleles D. a high frequency of crossing over 2. A man and a woman both show the normal phenotype for pigmentation, but both have one parent who is albino. Albinism is an autosomal recessive trait. What is the probability that their first child will be an albino? A. 0% B. 25% C. 50% D. 75% E. 100% 3. In snapdragons, heterozygote plants have pink flowers while the two homozygote plants have red or white flowers. What proportion of the offspring of a cross between a red- flowered plant and a white-flowered plant will have white flowers? A. zero B. 25% C. 50% D. 75% E. 100% 4. A recessive allele on the X chromosome is responsible for red-green color blindness in 4....
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