NEET BIOLOGY

Detailed explanation-1: -Two pea plants, both heterozygous for flower color, are crossed. The offspring will show the dominant purple coloration in a 3:1 ratio. Or, about 75% of the offspring will be purple.

Detailed explanation-2: -An example of a heterozygous genotype is one where one allele is dominant and the other is recessive. If both parents are heterozygous for a trait 15% will be have two dominant alleles and be homozygous dominant and 25% will be homozygous recessive. 50% will be heterozygous.

Detailed explanation-3: -If we cross two heterozygous purple plants, the probability of purple offspring would be 75%. We would expect to see three different genotypes in the F1 generation offspring. These would be 25% PP, 50% Pp, and 25% pp. In terms of phenotypes, these would be 75% purple (both PP and Pp) and 25% white (pp).

Detailed explanation-4: -If both parents are heterozygous (Ww), there is a 75% chance that any one of their offspring will have a widow’s peak (see figure). A Punnett square can be used to determine all possible genotypic combinations in the parents. A pedigree that depicts a dominantly inherited trait has a few key distinctions.