In peas, tellenss is dominate over dqarfness, and red colour of flowers is dominant over the white coolour. When a tall plant bearing red flowers was pollinated with a dwarf plant bearing white flowers, the different phenotypic groups were obtained in the progeny in numbers mentioned against them
Tall, Red = 138
Tall, White = 132
Dwarf, Red = 136
Dwarf, White = 128
Mention the genotypes of the two parents and of the four offspring types.

Explanation

The result shows that the four types of off spring are in a ratio of 1:1:1:1. Such a result is observed in a test cross progeny of a dihybrid cross.
The cross can be represented as
Parents Tall and red (TtRr) x Dwarf and white (ttrr)