Multiple choice

If gene 'B' prevents the expression of gene 'b' then gene 'B' is said to be

  1. dominant

  2. recessive

  3. codominant

  4. lethal
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A Correct answer
Explanation

When gene B prevents the expression of gene b, B demonstrates dominance. A dominant allele masks the effect of its recessive counterpart in heterozygous condition. This is different from codominance (both show) or lethality (causes death). The dominant-recessive relationship is fundamental to Mendelian inheritance.

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