Multiple choice

A gene which expresses itself only in the homozygous condition is called a/an

  1. dominant gene

  2. recessive gene

  3. allele

  4. mutiple allele
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

A recessive gene only expresses its phenotype when present in homozygous condition (two recessive alleles). In heterozygous condition (one dominant + one recessive), the dominant allele masks the recessive one. This is why recessive traits can skip generations - they remain hidden in carriers who are heterozygous.

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