To have a 100% chance of having offspring with the recessive genotype, what must be the genotypes of each parent

To have a 100% chance of having offspring with the recessive genotype, each parent's genotype must be homozygous recessive.

Explanation:

For a recessive trait to be phenotypically evident it is necessary that the two alleles that form it are recessive, that is, that they are recessive homozygous.

The presence of a single dominant allele in one parent will probably suppress the expression of the recessive gene in at least half of the offspring.

For the offspring to be 100% recessive, both parents must have a homozygous recessive genotype.

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Dominance principle link

the answer is a) cell division.

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