Question

in a mouse, black colored fur (f) is dominant over white colored fur (f). a cross between black colored mouse and white colored mouse is shown in the punnett square below. the genotypes of offspring in box 1 and box 2 are _____. ff and ff ff and ff ff and ff ff and ff

Explanation:

Step1: Determine parent genotypes

The white - colored mouse has genotype ff (since white is recessive). The black - colored mouse has at least one F allele. Assuming a cross between a heterozygous black mouse (Ff) and a white mouse (ff), the possible gametes from the black mouse are F and f, and from the white mouse are f.

Step2: Fill Punnett square

In a Punnett - square cross of Ff (black) and ff (white), when we combine the gametes:
For box 1: F (from black parent) combines with f (from white parent) to give Ff.
For box 2: f (from black parent) combines with f (from white parent) to give ff.

Answer:

B. Ff and ff