Question

In a heterozygous tall pea plant, the possibility of T gamete fertilizing T gamete during its selfing is ___________%.

• A. 100
• B. 75
• C. 25
• D. 50

Hint:

In a heterozygote, each allele has an equal 50% chance of being passed to a gamete.

Answer 1

The Correct Option is D

Step 1: Genotype of heterozygous tall plant.
A heterozygous tall pea plant has the genotype Tt. During gamete formation, it produces two types of gametes: T and t in equal proportion.
Step 2: Probability of T gametes.
Probability of producing a T gamete = 50%
Probability of another T gamete fertilizing it = 50%
Step 3: Calculation.
\[ \text{Probability of } T \times T = 50% \]
Step 4: Conclusion.
The chance of a T gamete fertilizing another T gamete during selfing is 50%.