Question

If a heterozygous tall pea plant is self-pollinated, what will be the heterozygous:homozygous ratio of the progenies?

• A. 1:3
• B. 1:1
• C. 3:1
• D. 1:2

Answer 1

Answer: (B)

1:1

Considering a heterozygous parent with T and t alleles is self-pollinated, we get two sets of heterozygous progeny and two homozygous progenies.

Homozygous $\to$ TT, tt =2

Heterozygous $\to$ Tt = 2

Ratio of Heterozygous:Homozygous = 2:2 = 1:1

So, the ratio between them is 1:1.