Question

A typical dihybrid cross is carried outbetween true breeding plant with yellowround seeds and a true breeding plant withgreen wrinkled seeds. With appropriatesymbol write the genotypes of —

1. Homozygous dominant and recessive parents.
2. Gametes produced by both the parents.
3. Gametes produced by the F, hybrid. (3)

Answer 1

1. Yellow seed colour predominates over green seed colour in pea plants, whereas round seed shape predominates over wrinkled seed shape.
2. Thus, a true-breeding plant with yellow round seeds (homozygous dominant) would have the genotype YYRR.
3. A true-breeding plant with green wrinkled seeds (homozygous recessive) would have the genotype - year.
4. The homozygous dominant and homozygous recessive parents would generate YR and yr gametes, respectively.
5. The resulting F 1 hybrid is YyRr, and the gametes are YR, Yr, yR, and yr.