NEET BIOLOGY

Detailed explanation-1: -Recessive alleles are only expressed when no dominant allele is present. In most sexually reproducing organisms, each individual has two alleles for each gene (one from each parent). This pair of alleles is called a genotype and determines the organism’s appearance, or phenotype.

Detailed explanation-2: -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-3: -Codominance. Codominance refers to the dominance in which the two alleles or traits of the genotypes (of both homozygotes) are expressed together in offspring (phenotype). There is neither a dominant nor recessive allele in cross-breeding.

Detailed explanation-4: -Recessive genetic conditions The condition is said to have a recessive inheritance pattern – it is not expressed if there is a functioning copy of the gene present.

Detailed explanation-5: -Codominance Codominance, as it relates to genetics, refers to a type of inheritance in which two versions (alleles) of the same gene are expressed separately to yield different traits in an individual.