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Q. How many different types of gametes will be formed by a pea plant with genotype TtYy upon self-fertilization?

NTA AbhyasNTA Abhyas 2020Principles of Inheritance and Variation

Solution:

Since genotype TtYy is heterozygous for two genes, i.e., it has both dominant and recessive alleles of two characters. Tt represents 'tall plant' and Yy represents 'yellow seed colour' with respect to garden pea plants. It will form a total of four types of gametes: TY, Ty, tY and ty.