In a monohybrid cross,120 plants are obtained | vedclass

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Question

(B) In a typical monohybrid cross between two heterozygous parents $(Aa 	imes Aa)$,the $F_2$ generation consists of genotypes in the ratio $1 AA : 2

Vedclass · Accepted Answer

$60 : 60$

Vedclass · Answer

(B) In a typical monohybrid cross between two heterozygous parents $(Aa 	imes Aa)$,the $F_2$ generation consists of genotypes in the ratio $1 AA : 2 Aa : 1 aa$.Here,$AA$ and $aa$ are homozygous,while $Aa$ is heterozygous.Total homozygous individuals = $1 + 1 = 2$ parts.Total heterozygous individuals = $2$ parts.Therefore,the ratio of homozygous to heterozygous individuals is $2 : 2$,which simplifies to $1 : 1$.Given a total of $120$ plants,the number of homozygous plants is $120 	imes (1/2) = 60$ and the number of heterozygous plants is $120 	imes (1/2) = 60$.Thus,the ratio is $60 : 60$.

In a monohybrid cross,$120$ plants are obtained. The ratio of homozygous and heterozygous individuals shall be:

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