Reference no: EM132787352

AP Biology Chi Square Practice Problems

Finally, bow-legs is hypothesized to be X-linked recessive in Drosophila melanogaster. The P1 females were, once again, homozygous wild type but the males were bow-legged. There were 52 wild type males and 67 wild type females in the F1 generation. The F2 generation contained 30 wild type males, 75 wild type females, 40 bow-legged males and no bow-legged females. Does this data support or reject the hypothesis? Use chi square to prove your position.

In 1901, Bateson reported the first post-Mendelian study of a cross involving two characters. White leghorn chickens, having white feathers and large "single" combs, were crossed to Indian Game Fowl, having dark feathers and small "pea" combs. The F1 were white with pea combs, and the F2 distribution was: 111 white pea, 37 white single, 34 dark pea, and 8 dark single. What phenotypic ratio would you expect? Test your prediction using chi-square.

In rumbunnies large ears (E) is dominant to small ears (e) and tufted ears (T) is dominant to shaven ears (t). Two heterozygous rumbunnies are crossed, with the following results: 420 large tufteds, 189 small shavens, and 141 large shavens. How well do these results correspond with expectation if large ears are epistatic over ear hair length? If small ears are epistatic over ear hair length? Use chi-square.