Question

How many types of gametes are produced by the parents of Mendel’s monohybrid $F_2$ progeny?

• A. One
• B. Three
• C. Two
• D. Four

Answer 1

The correct option is C

Two

Mendel’s monohybrid $F_1$ plants are all heterozygous. They possess both the dominant and recessive alleles of the respective gene. Hence they produce two types of gametes. For example, in a monohybrid cross of plant height (pure tall plant (TT) crossed with pure dwarf plant (tt) ), the $F_1$ plants will have the genotype (Tt) (heterozygous plants having one dominant and one recessive allele). The $F_1$ will produce two gametes, one with the dominant allele (T), and other gamete containing the recessive allele (t).