Answer Happy

Question 18 (5 points) Which one of the following is an example of epistasis? O Drosophila flies heterozygous for a bent wing mutation produce offspring, 75% of which are wild type and 25% of which have bent wings An allele for brown hair is dominant over an allele for red hair O A homozygous yellow eye mutant fly (genotype yy) crossed to a homozygous bent wing mutant fly (genotype bw bw) produces only offspring with a wild type phenotype (red eyes and straight wings) OTwo Drosophila mutants, each defective in a single different gene, produce wings half normal length. Double mutants, defective in both genes, also produce flies with wings half normal length. thort lanced mutation bred to a wild type male produced 50