Question

Which of the following is true for mating between gray female from cross IV and gray male from cross II?

• A. All of the offsprings would be gray.
• B. All of the offsprings would be white.
• C. Half of the offsprings would be gray.
• D. One-quarter of the offsprings would be gray.
• E. One-quarter of the offsprings would be white.

Answer 1

The correct option is A All of the offsprings would be gray.

	G	g
G	GG (gray)	Gg (gray)
G	GG (gray)	Gg (gray)

In cross IV, no white offspring is produced. This means the genotype of gray female was GG while that of the white male was gg.

Whereas in cross II, some white and some gray offsprings are produced. This means the genotype of both gray female and gray, male is Gg.

So, the cross between gray female (GG) of cross IV and gray male (Gg) of cross II occurred, this resulted in all gray offsprings as shown in the cross above.

So, the correct option is 'All of the offsprings would be gray'.