NEET BIOLOGY

GENETICS AND EVOLUTION

INHERITANCE AND VARIATION

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Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]

What term is used to describe a genotype with two of the same alleles?

A	Homozygous
B	Heterozygous
C	Either A or B
D	None of the above

Explanation:

Detailed explanation-1: -Homozygous refers to having identical alleles for a particular locus.

Detailed explanation-2: -The presence of two identical alleles at a particular gene locus. A homozygous genotype may include two normal alleles or two alleles that have the same variant.

Detailed explanation-3: -An individual that contains two different alleles of a gene is heterozygous.

Detailed explanation-4: -Homozygous (and its less common form homozygotic) means “relating to a cell that has two identical alleles for a particular gene at corresponding positions on homologous chromosomes.”

Detailed explanation-5: -The expected genotype ratio when two heterozygotes are crossed is 1 (homozygous dominant) : 2 (heterozygous) : 1 (homozygous recessive). When a phenotypic ratio of 2 : 1 is observed, there is probably a lethal allele.

There is 1 question to complete.