Question

If a mutation is not visible in successive generations, it is called as a

• A. Deletion
• B. Dominant mutation
• C. Recessive mutation
• D. Segregation

Answer 1

The correct option is C Recessive mutation

Removal of one or more nucleotide bases to the DNA segment is known as deletion. It can remove one to many nucleotide bases from the DNA resulting in shortening of the encoded proteins which are mostly nonfunctional which makes option A wrong. Segregation refers to the separation of two-factor for a trait, present together in a heterozygous individual, during gametogenesis. This results in a purity of gametes which makes option D wrong. Dominant mutations are the one that expresses themselves in heterozygotes as well as in homozygous dominants and therefore are expressed in each successive generation which makes option B wrong. Recessive mutations are suppressed by the presence of wild-type dominant alleles and are expressed only in recessive homozygotes; their detections need development of hybrid line by the cross between two pure varieties followed by selfing of hybrid to obtain recessive homozygotes; they skip generations. The correct answer is C.