A gene is said to be dominant if

It expresses its effect only in homozygous stage.

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It is expressed only in heterozygous condition.

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It is expressed both in homozygous and heterozygous condition.

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It is never expressed in any condition.

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Solution

The correct option is D It is expressed both in homozygous and heterozygous condition.
A dominant gene is a gene, which can express in both homozygous and heterozygous conditions. For instance, TT is expressed as tall phenotype; Tt also gives tall phenotype. Here, 'T' is the dominant gene.
So, the correct answer is 'It is expressed both in homozygous and heterozygous condition.'

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Similar questions

\begin{matrix} Column I & Column II A & Dominant allele & 1 & It gets expressed only in homozygous condition B & Recessive allele & 2 & Both the alleles of the gene are different C & Homozygous & 3 & Both the alleles of the gene are same D & Heterozygous & 4 & It gets expressed in both homozygous and heterozygous conditions \end{matrix}

Dominant character appears both in homozygous and heterozygous condition, whereas recessive character appears only in homozygous condition.

Which is the type of Gene that can express in both Homozygous and Heterozygous Conditions?

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