Question

Explain about f1 progeny and f2 progeny obtained by mendel when he bred the tall and dwarf varieties of pea

Answer 1

When we cross homozygous tall pea plant TT with dwarf tt then in F1 gen we get all tall plants with genotype Tt and for F2 gen we self pollinate F1 progenies and we get phenotype ratio as

Tall : dwarf

3 : 1

And the genotypic ratio be like

TT : Tt : tt

1 : 2 : 1

If we cross heterozygous Tt tall pea plant with dwarf tt plant then in F1 gen we get phenotypic ratio 1:1 and genotypic ratio Tt :tt - 1:1

for F2 gen we do self pollination.

Answer 2

Explanation:

the ratio is 1:2:1

hence he make the cHecker board