Question

If the cell of an organism heterozygous for two pairs of genes represented by Xx, Zz undergoes meiosis, then the possible genotypic combination of gametes will be

• A. XZ; xz; Xz; xZ
• B. XZ; xz; Xz
• C. Xx; Zz; Xz
• D. Data incomplete

Answer 1

The correct option is A XZ; xz; Xz; xZ

The possible combination of gametes for the heterozygous gene pairs = 2${}^n$. Here, n = 2. Thus the maximum number of combinations = 2${}^2$ = 4.
XZ, Xz, xZ and xz