The genotype of green-stemmed tomato plants is denoted as GG and that of purple-stemmed tomato plants as gg. When these two are crossed, I. What colour of stem would you expect in their F 1 progeny? ii. Give the percentage of purple-stemmed plants if F 1 plants are self-pollinated. In what ratio would you find the genotyped GG and Gg in the F 2 progeny?

Question

Philoid · Accepted Answer

i.Green (Genotype will be Gg)

iii. 25%

Out of the four genotypes only one genotype gives purple

Stemmed plants therefore only 25% of the plants are

purple stemmed.

iii.The ratio of GG and Gg plants is 3:1 as shown in the figure.

Note: In the above figures, green colour depicts green stemmed plants and purple colour shows purple stemmed plants.