AP BIOLOGY

Detailed explanation-1: -Answer and Explanation: The type of allele that is often hidden or overshadowed by dominant allele is known as a recessive allele. The trait expressed by the recessive allele only manifests if the individual is homozygous for that trait.

Detailed explanation-2: -Genes come in pairs (that is, are present in two copies in an organism). Genes come in different versions, now called alleles. When an organism has two different alleles of a gene, one (the dominant allele) will hide the presence of the other (the recessive allele) and determine appearance.

Detailed explanation-3: -But recessive deleterious alleles are “hidden” from natural selection by their dominant non-deleterious counterparts. An individual carrying a single recessive deleterious allele will be healthy and can easily pass the deleterious allele into the next generation.

Detailed explanation-4: -Alleles produce phenotypes (or physical versions of a trait) that are either dominant or recessive. The dominance or recessivity associated with a particular allele is the result of masking, by which a dominant phenotype hides a recessive phenotype.

Detailed explanation-5: -A dominant allele hides a recessive allele and determines the organism’s appearance.