Question

When the F1 plants are allowed to self fertilize, they produced both yellow and green peas in the next generation. How is this explained?

Answer 1

In F2 generation homozygous dominant, heterozygous dominant and homozygous recessive offspring are obtained so they produced both yellow and green peas in the next generation

Explanation:

After the cross between two pure breeds having yellow and green pea all the offsprings in the F1 generation were heterozygous dominant for yellow peas.

Y Y

y Yy Yy

y Yy Yy

So when these F1 plants are crossed than three types of genotype will be produced that is homozygous dominant(YY), heterozygous dominant(Yy), and homozygous recessive.

Y y

Y YY Yy

y Yy yy

So homozygous dominant and heterozygous dominant offspring will produce yellow peas because yellow is the dominant trait and homozygous recessive offspring will produce green peas.