What does a dominant allele do in a heterozygote?

Answer and explanation

Correct answer: C. It determines the phenotype

  1. Step 1: The dominant allele is expressed when it is present.
Answer
It determines the phenotype.
Why not the others: It is lost from the cell: both alleles remain; It blends with the recessive allele: there is no blending in Mendelian inheritance; It is always more common in the population: dominance does not control frequency.

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