What allele is expressed in a heterozygous allele?

The dominant allele

The dominant allele.

When a person is heterozygous for a particular trait, in general the dominant trait is expressed. The classic example of this is pea plant height from Mendelev's experiments - a pea plant that...

In a heterozygous allele pair, one dominant and one recessive allele for a trait are present in a person's genotype. Therefore it is the recessive allele that is not expressed.

False. The dominant allele is expressed.