Question

Give the (i) percentage of white flowered plants and (ii) ratio of the gene combinations WW, Ww, and ww in F₂ generation.

Hint:

The Mendelian inheritance ratio of 1:2:1 in Fsubscript{2} generation reflects the segregation of alleles during gamete formation and fertilization.

Answer 1

When the F₁ generation plants (all Ww) are crossed with each other, the F₂ generation shows the following results:
(i) Percentage of white flowered plants:
- White flowers occur in the F₂ generation when the genotype is ww. According to Mendel's ratio, 25% of the plants in the F₂ generation will have the white flower trait (ww).
(ii) Ratio of gene combinations WW, Ww, and ww in F₂ generation:
- The ratio of gene combinations in F₂ generation is 1:2:1. This means:
- 1 WW (homozygous dominant)
- 2 Ww (heterozygous)
- 1 ww (homozygous recessive)