In snapdragons red flower color (C R ) is incompletely dominant to white flower color (C W ) and the heterozygote has pink flowers. Green leaves (G) are dominant to purple leaves (g). A pink flowered, purple leafed snapdragon is crossed with a pink flowered snapdragon heterozygous for leaf color. 1. What proportion of the progeny should be pink flowered, purple leaved plants?

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Duchenne muscular dystrophy is a serious condition caused by a recessive allele of a gene on the human x chromosome. the patients have muscles that weaken over time because they have absent or decreased dystrophin, a muscle protein. they rarely live past their twenties. how likely is it for a woman to have this condition? a) women can never have this condition. b) one-fourth of the daughters of an affected man would have this condition. c) one-half of the daughters of an affected father and a carrier mother could have this condition. d) only if a woman is xxx could she have this condition.

Stephen is a student who wants to test his knowledge of medical terminology. which option could he use?