A recessive allele expresses itself in the phenotype
- A. only when present in the homozygous condition
- B. in both the heterozygous and homozygous conditions
- C. only in males
- D. only in the F1 generation
Explanation
In a heterozygote the dominant allele masks the recessive one, so the recessive trait appears only when both alleles are recessive. This hiding is why traits can skip a generation and reappear in grandchildren.
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