If an individual inherits a D from his mother and a d from his father. The individual will be classified as heterozygous. The correct option is C.
Heterozygous means having different alleles. It is a term of genetics. When a person for a character contains two different genes, then it's called heterozygous. For example, having red color and brown color hair allele.
Here the individual has a D and d, which means two different alleles are present, so it is heterozygous.
Dd, Heterozygous.
DD, Homozygous dominant.
dd, Homozygous recessive.
Thus, option C. heterozygous is correct regarding the individual.
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