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Genes are segments of DNA that determine the phenotype of an individual. Pea colors can be yellow or green. When two plants that produce yellow peas were crossed, the offspring produced green peas. This is because the parents were for pea color. Because there are only two options for pea color, the plants’ pea color is a case of

Question

Genes are segments of DNA that determine the phenotype of an individual. Pea colors can be yellow or green. When two plants that produce yellow peas were crossed, the offspring produced green peas. This is because the parents were for pea color. Because there are only two options for pea color, the plants’ pea color is a case of

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Solution

The text seems to be incomplete, but based on the information given, it appears to be a case of Mendelian inheritance, specifically a case of incomplete dominance or codominance.

In Mendelian inheritance, traits are determined by individual genes on chromosomes in the nucleus of a cell. Each gene has a specific location on a chromosome and may exist in several forms, or alleles, which lead to variation in the trait that the gene controls.

In this case, the pea color is determined by a gene with two alleles: one for yellow and one for green. The parents, although they produce yellow peas, must be heterozygous for the pea color gene (meaning they have one yellow allele and one green allele) because they produced offspring that have green peas.

In incomplete dominance, the heterozygous phenotype is somewhere between the two homozygous phenotypes. In codominance, both alleles are expressed fully to produce a third phenotype.

Without more information, it's hard to say which of these is the case. If the offspring's peas are a blend of green and yellow, it would be incomplete dominance. If the peas are spotted or striped with green and yellow, it would be codominance.

So, the missing word in your sentence could be "heterozygous" and the last part could be "a case of incomplete dominance or codominance".

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