Question

What is the ratio of different types of seeds need it to get in f1 generation?

Answer 1

The phenotypic ratio is 9:3:3:1 whereas the genotypic ratio is 1:2:1:2:4:2:1:2:1. For example - In a cross between RRYY. (round yellow seeds of pea plant) and rryy (greThe phenotypic ratio is 9:3:3:1 whereas the genotypic ratio is 1:2:1:2:4:2:1:2:1.

For example - In a cross between RRYY (round yellow seeds of pea plant) and rryy (green wrinkled seeds of pea plant), all F1 offspring would be RrYy i.e. Round yellow.

In F2 generation, we will get the following combination of gametes - RY Ry rY ry RY. When crossed, they would give the following possible offspring:

1 YYRR + 2 YYRr + 1 YYrr + 2YyRR + 4YyRr + 2 yyRR + 1yyRR + 2yyRr + 1yyrr

Thus the genotype ratio is 1:2:1:2:4:2:1:2:1.

 

The phenotype ratio is 9:3:3:1.  i.e. 9 round-yellow : 3 wrinkled-yellow : 3 round-green : 1 wrinkled-green pea seedsen wrinkled seeds of pea plant), all F1 offspring would be RrYy