Question

What will be the ratio of tall and dwarf plants in the F2 generation when a tall plant carrying two identical alleles is crossed with a dwarf plant carrying two identical alleles?

• A. 3:1
• B. 2:1
• C. 1:2:1
• D. 1:1

Answer 1

The correct option is A 3:1

In the F2 generation, we get combinations of both tall and dwarf plants. These combinations appear in the following ratio:
1(identical dominant allele): 2(dissimilar allele):1 (identical recessive allele).
The combinations for the given example will be as follows: