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What Are Heterozygosity and Homozygosity?

Which of the ...

Question

Which of the following represent(s) a heterozygous condition?

A

TT

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B

Tt

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C

tt

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D

Both A and C

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Solution

The correct option is B
Tt

Most multicellular organisms have two sets of chromosomes; that is, they are diploid. These chromosomes are referred to as homologous chromosomes. If both alleles at a gene (or locus) on the homologous chromosomes are the same, they and the organism are homozygous with respect to that gene. If the alleles for a gene are different, then organisms are heterozygous for that gene. For example, the gene for tallness can be present in three forms TT (homozygous), Tt (heterozygous), tt (homozygous).

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What Are Heterozygosity and Homozygosity?

Standard XI Biology

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