NEET BIOLOGY

Detailed explanation-1: -Dominant alleles are expressed exclusively in a heterozygote, while recessive traits are expressed only if the organism is homozygous for the recessive allele. A single allele may be dominant over one allele, but recessive to another.

Detailed explanation-2: -First, the Law of Dominance and Uniformity states that some alleles, which are variants of a particular gene found at the same chromosomal locus or location, are dominant over the other alleles for a given gene. Those traits that are not dominant are termed recessive.

Detailed explanation-3: -Mendel’s law of dominance states that: “When parents with pure, contrasting traits are crossed together, only one form of trait appears in the next generation. The hybrid offsprings will exhibit only the dominant trait in the phenotype.”

Detailed explanation-4: -1. Law of dominance: A dominant gene will express itself over the recessive gene. 2. Law of segregation: Parental genes are randomly separated to the germ cells such that each germ cell receives only one gene from each pair.

Detailed explanation-5: -In simple words, the law of dominance states that recessive traits are always dominated or masked by dominant trait. For example, when pea plants with round seeds (RR) are crossed with plants with wrinkled seeds (rr), all seeds in F1 generation were found to be round (Rr).