AP BIOLOGY

Detailed explanation-1: -In rabbit, black skin (B) is dominant over brown skin (b), and short hair (S) is dominant over long hair (s). All F1 offsprings are heterozygous black-short haired.

Detailed explanation-2: -Answer and Explanation: In order for a mouse to express white fur, it must possess both recessive (b) genes for white fur.

Detailed explanation-3: -Within a mouse population, the black fur allele (B) is dominant to the white fur allele (b) and the short whisker allele (S) is dominant to the long-whisker allele (s). A heterozygous black-furred short-whiskered mouse is crossed with a homozygous white-furred long-whiskered mouse.

Detailed explanation-4: -In mice, black fur (B) is dominant to brown fur (b) and a short tail (T) is dominant to a long tail (t). Two mice with the genotype BbTt have two separate litters of offspring together.