In a complementary gene interaction,calculate | vedclass

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(B) In a complementary gene interaction,the presence of at least one dominant allele of both genes ($A$ and $B$) is required for the expression of a s

Vedclass · Accepted Answer

$2 	ext{ phenotypes, } 4 	ext{ genotypes}$

Vedclass · Answer

(B) In a complementary gene interaction,the presence of at least one dominant allele of both genes ($A$ and $B$) is required for the expression of a specific phenotype. For the cross $AaBb 	imes aaBB$: $1$. The gametes produced by $AaBb$ are $AB, Ab, aB, ab$. $2$. The gametes produced by $aaBB$ are $aB$. Performing the cross: - $AB 	imes aB = AaBB$ - $Ab 	imes aB = AaBb$ - $aB 	imes aB = aaBB$ - $ab 	imes aB = aaBb$ The resulting genotypes are $AaBB, AaBb, aaBB, aaBb$. There are $4$ distinct genotypes. Regarding phenotypes: - $AaBB$ and $AaBb$ both have at least one dominant allele of both genes ($A$ and $B$),so they express the same phenotype. - $aaBB$ and $aaBb$ lack the dominant allele $A$,so they express a different phenotype. Thus,there are $2$ phenotypes and $4$ genotypes. The correct option is $B$.

In a complementary gene interaction,calculate the number of phenotypes and genotypes produced in a cross $AaBb \times aaBB$.

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