NEET BIOLOGY

GENETICS AND EVOLUTION

GENETIC BASIS OF INHERITANCE

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
A carrier of a genetic disorder who does not show symptoms is most likely to be ____ to transmit it to offspring.
A
heterozygous for the trait and able
B
heterozygous for the trait and unable
C
homozygous for the trait and able
D
homozygous for the trait and unable
Explanation: 

Detailed explanation-1: -A carrier, as related to genetics, is an individual who “carries” and can pass on to its offspring a genomic variant (allele) associated with a disease (or trait) that is inherited in an autosomal recessive or sex-linked manner, and who does not show symptoms of that disease (or features of that trait).

Detailed explanation-2: -Heterozygotes, with only one mutated allele, are clinically normal carriers of the trait. Homozygous animals usually have clinical disease, and the onset is usually early in life.

Detailed explanation-3: -In a heterozygous genotype, the dominant allele overrules the recessive one. Therefore, the dominant trait will be expressed. The recessive trait won’t show, but you’re still a carrier. This means you can pass it on to your children.

Detailed explanation-4: -In genetics, describes an individual who does not have a particular phenotypic trait or disease.

There is 1 question to complete.