NEET BIOLOGY

Detailed explanation-1: -When Mendel crossed two “true-breeding” pea plants with contrasting traits, why did all the plants from the F1 generation only show one of the traits? All of the F1 generation was heterozygous for the trait.

Detailed explanation-2: -Two pea plants one with round green seeds (RRyy) and another with wrinkled yellow (rrYY) seeds produce F1 progeny that have round, yellow (RrYy) seeds.

Detailed explanation-3: -Because the allele that produces wrinkled peas is recessive, the offspring of this cross will all have wrinkled peas. Mendel then explains the concept of dominant and recessive alleles by saying, “By performing my experiments with peas, I learned a lot about genetics and how traits are passed on.

Detailed explanation-4: -For a monohybrid cross of two true-breeding parents, each parent contributes one type of allele. In this case, only one genotype is possible in the F1 offspring. All offspring are Yy and have yellow seeds.