alleryStart learning →In which individuals can a recessive allele be observed in the phenotype?
AIn heterozygotes for that gene
BIn homozygous recessive individuals
CIn homozygous dominant individuals
DIn any diploid individual with the allele
Answer & Solution
Correct answer: B. In homozygous recessive individuals
1. Homozygous dominant and heterozygous individuals look identical, because the dominant allele is expressed.
2. The recessive allele is therefore only observed in homozygous recessive individuals.
3. A heterozygote carries the recessive allele but does not show it, so it stays hidden.
4. A homozygous dominant individual does not carry the recessive allele at all.
_Source: OpenStax Biology (1st ed., CC BY 4.0), Ch 12 "Mendel's Experiments and Heredity", section 12.2 Characteristics and Traits_
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