Phenylketonuria (PKU) is a disease that results from an auto

Phenylketonuria (PKU) is a disease that results from an autosomal recessive gene. Two normal parents… Show more Phenylketonuria (PKU) is a disease that results from an autosomal recessive gene. Two normal parents produce a child with PKU. What is the probability that a sperm from the father will contain the PKU allele, and what is the probability that their next child will have PKU? Question 15 options: A) ½, ½ B) ½, ¼ C) 1, ½ D) 1, ¼ n humans, two traits, widow’s peak and unattached earlobes, depend on separate dominant genes located on different chromosomes. A man with a widow’s peak and attached earlobes (whose father had unattached earlobes and was without a widows peak) married a woman without a widow’s peak but with unattached earlobes (whose father had attached earlobes). What’s the probability that their first child will have no widows peak and attached earlobes: Question 16 options: A) 0 B) 1/2 C) 1/4 D) 1/16 In garden peas, tall plants (T) are dominant over short (t), round seeds (R) are dominant over wrinkled (r), and purple flowers (P) are dominant over white(p). Consider the following pea plants, and answer the questions below: plant 1 = RrTtPp, plant 2 = RrttPp What percentage of plants will have a dominant phenotype for all four traits? What proportion of plants will be true-breeding for all three traits? Question 17 options: A) 0 dominant for all three traits, 1/32 true breeding for all three traits B) 9/32 dominant for all three traits, 1/32 true breeding for all three traits C) 9/32 dominant all three traits, 1/8 true breeding for all three traits D) 9/64 dominant for all three traits, 1/16 true breeding for all three traits In Drosophila, the curly wing mutation is homozygous lethal (curly phenotype is dominant, lethal phenotype is recessive). You cross two curly-winged flies. What proportion of their offspring will have curly wings. Question 18 options: A) 0 B) 1/4 C) 1/2 D) 2/3 E) 1 • Show less

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