Question : In peas, tallness is dominant over dwarfness and red colour of flowers is dominant over the white colour. 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.

Question : In peas, tallness is dominant over dwarfness and red colour

1.	Question : In peas, tallness is dominant over dwarfness and red colour of flowers is dominant over the white colour. 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.
Answer» Solution :The result SHOWS that the four types of offspring 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: = Tall & Red (Tt Rr) `XX` Dwarf and White (TTRR)