alleryStart learning →The reason recessive alleles can be carried without being seen is that:
AOne normal allele masks the other
BRecessive alleles are always deleted
CRecessive alleles cannot be inherited
DEvery carrier shows a mild version
Answer & Solution
Correct answer: A. One normal allele masks the other
1. An individual without a disorder must have at least one normal allele.
2. That is why such a person's genotype gets an A question mark designation in a pedigree.
3. Therefore, recessive alleles can be carried and not expressed by individuals.
4. The allele is not lost: it reappears in later generations when two carriers meet.
5. Mendel saw the same thing when the green pod allele returned in the F2.
_Source: OpenStax Biology for AP(R) Courses (CC BY 4.0), Ch 12 'Mendel's Experiments and Heredity', sections 12.1-12.3_
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