Question

The percentage of homozygous/ pure breeding forms in the dihybrid F2?
A)25% B)50% C)75%​

Answer 1

Answer:

Explanation:

50%

Answer 2

The percentage of homozygous/ pure breeding forms in the dihybrid F2 is B) 50%.

• In Mendel's cross, in the F1 generation, purebred recessive and dominant parents are crossed.
• The offsprings produced are all heterozygous and show dominant character.
• In the F2 generation, two heterozygous parents are crossed to produce 4 offspring showing 2 different phenotypes.
• The offsprings have 3 different genotypes.
• The homozygous dominant is 25%, the homozygous recessive is 25% and the heterozygous dominant is 50%.
• Hence, the total percentage of homozygous offspring is 25 + 25 = 50%.