Question

23.
Out of 400 pea seeds, 300 seeds produced were
round in F2 generation. If round (R) seed is a dominant
trait and wrinkle (t) seed is a recessive trait, then the
correct genotypes of parents were
OPTIONS
MARK FOR REVIEW​

Answer 1

Answer:

9:3:3:1

Explanation:

A cross is made between homozygous yellow round seeds(YYRR) to another homozygous green wrinkled seeds(yyrr). In the F1 generation, all plants are heterozygous yellow round(YyrRr). When this plant is subjected to self pollination, in the F2 generation, 9 plants are Yellow round, 3 plants are yellow wrinkled, 3 plants are green round and 1 plant is green wrinkled are formed.

The dihybrid phenotypic ratio is 9:3:3:1.

So, the correct option is ‘9:3:3:1’.