Question

A yellow coloured seeded dominated pea plant denoted by YY is crossed breed woth that of green colour seeded plant donated by yy.(i) state the colour of seed you would expect in thheir F1 generations of plant(ii) show the expected ratio of the genotype YY and Yy in the F2 progeny by a suitable chart

Answer 1

Answer:

The colour in f1 generation will be yellow(Yy).heterozygous

Answer 2

i】colour of seed expected in F1 generation is all are yellow colour as yellow dominate on green .

ii】genotype ratio of YY to Yy in F2 is

1:2:1

●Yellow coloured dominate seed=YY

●Green colour seeded=yy

●When this yellow coloured seeds are crossed with green colour the F1 generation are all heterozygous Yy and all are yellow coloured .

●Now for F2 generation when heterozygous f1 is self crossed

Genotypic ratio of F2 is 1:2:1 and the

Phenotypic ratio will be 3:1 three yellow coloured and 1 green coloured seed.