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

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

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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 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 $B$.

Column-$I$	Column-$II$
$(w)$ Blood group	$(a)$ Polygenic inheritance
$(x)$ Skin colour	$(b)$ Aneuploidy
$(y)$ Mendelian disorder	$(c)$ Incomplete dominance
$(z)$ Chromosomal disorder	$(d)$ Sickle-cell anaemia
	$(e)$ Co-dominance

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

Similar Questions

Select the correct match.

Match the following columns.

Column-$I$ Column-$II$

$(w)$ Blood group $(a)$ Polygenic inheritance

$(x)$ Skin colour $(b)$ Aneuploidy

$(y)$ Mendelian disorder $(c)$ Incomplete dominance

$(z)$ Chromosomal disorder $(d)$ Sickle-cell anaemia

$(e)$ Co-dominance

The inheritance of $ABO$ blood group is an example of which of the following conditions?
$I -$ Complete dominance,$\quad II -$ Co-dominance
$III -$ Multiple allelism,$\quad IV -$ Incomplete dominance

$A$ gene which suppresses the activity of another gene but does not lie on the same locus is called:

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