If a gene is dominant,then ................

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(C) dominant gene is defined as an allele that expresses its phenotype even in the presence of a different allele (heterozygous condition) or when two

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It expresses itself in both homozygous and heterozygous conditions.

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(C) dominant gene is defined as an allele that expresses its phenotype even in the presence of a different allele (heterozygous condition) or when two identical alleles are present (homozygous condition).In a diploid organism,if the genotype is $AA$ (homozygous dominant) or $Aa$ (heterozygous),the dominant trait will be expressed.Therefore,the dominant gene expresses itself in both homozygous and heterozygous conditions.

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