Question

If the two parents are heterozygous for a particular gene, how many different genotypes could possibly be seen in the $F_1$ generation?

• A. One
• B. Two
• C. Three
• D. Four

Answer 1

The correct option is C

Three

In the punnet square given above, both parents are heterozygous for the gene. In this case, there is a chance for the offspring to be homozygous dominant (BB) or homozygous recessive (bb). Alternatively, the offspring may also be heterozygous dominant (Bb). So, in total you can have three genotypes.