Question

How do dominant and recessive alleles affect phenotype?

Answer 1

Homozygosity occurs when the two gene copies contain the same allelefor a particular phenotype, or expressed trait. ... Phenotypes can either be dominant or recessive. If aphenotype is dominant, only one of thealleles for it needs to be present. If it'srecessive, both alleles have to be present.

Answer 2

ANSWER

That is, they describe how likely it is for a certain phenotype to pass from parent offspring. ... For a recessive allele to produce a recessive phenotype, the individual must have two copies, one from each parent. An individual with one dominant and one recessive allele for a gene will have the dominant phenotype.

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