If two heterozygous plants with round seeds are mated what f

If two heterozygous plants with round seeds are mated, what fraction of the progeny with round seeds are genotypically heterozygous?

1/4 or 2/3 or 1/2 or 3/4

Solution

Ansawer: 2/3

If you assume the round character is denoted by D and wrinkle is denoted by d.

DD- round (homozygous)

Dd-round (heterozygous)

dd-wrinkle. (homozygous)

If a cross made between two heterozygous round Dd x Dd , it gives one DD, two Dd and one dd. Among the three round seeds, two are hetetozygous i.e., 2/3.