AP BIOLOGY

Detailed explanation-1: -Laboratory mice naturally come in a large variety of colors ranging from black to white, brown to yellow, and spotted.

Detailed explanation-2: -Mice range in color from white to light brown, dark brown, silver, gray or black. Some mice exhibit dual coloration. White and brown is the most common of these combinations, while some specimens may have white, brown and black coats. Colorful mice are typically bred with those colorations for the pet trade.

Detailed explanation-3: -Brown mice have the genotype BB or Bb. White mice have the genotype bb. The frequency of the BB genotype is 0.30.

Detailed explanation-4: -In mice, black coat colour (allele B) is dominant to brown coat colour (allele b). The offspring of a cross between a black mouse (BB) and a brown mouse (bb) were allowed to interbreed.