Thank you for reporting, we will resolve it shortly
Q.
A pea plant with genotype $TTRrYy$ will produce gametes of how many genotypes?
Principles of Inheritance and Variation
Solution:
Types of gametes $=2^{n}$, where $n$ is the heterozygosity. Since $n=2$, so gametes produced from a pea plant having genotype $TTRrYy$ are : $TRY, Try, TRy, TrY$.