JUPEBBiologyGenetics

An organism with the genotype Tt for height is described as

Ahomozygous recessive.
Bhomozygous dominant.
Chaploid.
Dheterozygous.CORRECT
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Why the answer is D, and why the others tempt you.
Heterozygous means the two alleles of the gene are different. TT is homozygous dominant and tt homozygous recessive. A Tt organism shows the dominant phenotype (tall) because T masks t.
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