Question

When a tall plant with rounded seeds (TTRR) is grossed with a Dwarf plant with wrinkled seeds (ttrr) the F₁ generation consists of tall plants with rounded seeds. How many types of gametes the F₁ plant would produce?

Options

• One

• Three

• Four

• Eight

Answer 1

Four

Explanation:

The phenotypic ratio of the dihydric cross is 9 : 3 : 3 : 1 (the cross mode to study the inheritance of two pairs of factors or alleles of two genes, e.g. AAbb × aaBB).