These are called multiallelic traits. If GGHHII was crossed with gghhii, what would the genotype for every offspring be? a.
b. GGhHII
c. GgHhIi
d. ggHHii

In the crossing of individuals with multiallelic traits, the crossing of a GGHHII individual with a gghhii individual would produce offspring of hybrid individuals for all three traits whose genotype would be GgHhIi (option c).

Explanation:

The individuals GGHHII and gghhii are pure lines for each of the traits —multiallelic traits— they express, one of them having the three dominant traits and the other three recessive traits. The product of crossing two pure lines with dominant and recessive traits is an offspring of 100% heterozygous individuals.

This can be tested by making a Punnett square for this cross:

GGHHII X gghhii

Alleles     GHI        GHI

ghi         GgHhIi   GgHhIi

ghi         GgHhIi   GgHhIi

Thus the offspring in the cross of two individuals, dominant and recessive, for multiallelic traits G, H and I is GgHhIi

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