Is it possible for a Mendelian trait to be both dominant and

Is it possible for a Mendelian trait to be both dominant and recessive?

Solution

Dominant and recessive are not absolute terms. They are relative terms. For example, allele A can be dominant over allele B. At the same time, allele A can be recessive to another allele C. In strict terms, Mendel considered only two alleles for a single gene. However, most of the gene in nature have multiple alleles. Recessive and dominance character is also regulated by environment as well. Codominant alleles can neither be stated as dominant or recessive to each other.

So,

Yes. A given allele can be dominant to one allele and it can be recessive to another allele.

(Mendel never considered multiallelism)