Question

A homozygous plant having round(R) and yellow(Y) seeds are crossed with the homozygous plant having wrinkled(r) and green(y) seeds.-

1. Give the scientific name of the plant on which Mendel conducted his hybridization experiments.
2. Give the genotype of the F, generation.
3. Give the dihybrid phenotypic ratio and the phenotype of the offspring of the F, generation when the two plants of the F generation are crossed.
4. Name and state the law which explains the dihybrid ratio.
5. Give the possible combinations of gametes that can be obtained from the F1 hybrid.
   

Answer 1

A homozygous plant having round(R) and yellow(Y) seeds are crossed with the homozygous plant having wrinkled(r) and green(y) seeds.-

1. Pisum sativum (sweet pea)
2. 50% round yellow and 50% wrinkled green.
3. 9:3:3:1
4. Law of independent assortment: When there were two pairs of contrasting characters, the distribution of the members of one pair into the gametes is independent of the distribution of the other pair.
5. All are round and yellow seeds.