Biology for IGCSE & O level - Inheritance (Section 4 - No. 1)

If a recessive allele is present in a population, but does not express itself, what must be true about the individual?

The individual is heterozygous.

The individual is homozygous dominant.

The individual has a disease caused by the recessive allele.

The individual's cells don't have genes.

The recessive allele is only expressed in the absence of the dominant allele, therefore it is heterozygous.