Question

In a garden pea plant, the flowers are in axial (A) position. Find out the proportion of flowers in terminal position (a), if a cross is made between two heterozygous plants.

Answer 1

Axial (A) is dominant over terminal (a). Heterozygous plants have the genotype Aa.

Cross: Aa × Aa

Punnett Square:

- AA (Axial) 

- Aa (Axial)

- Aa (Axial)

- aa (Terminal)

The ratio is 3:1.

The terminal position (aa) appears in 1 out of 4 cases.

The proportion is `1/4` or 25%.