Pure homozygous offspring in a dihybrid cross | vedclass

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(C) In a dihybrid cross,the ${F_2}$ generation consists of $16$ possible combinations of gametes.Among these,the pure homozygous genotypes are $YYRR$,

Vedclass · Accepted Answer

$1/8$

Vedclass · Answer

(C) In a dihybrid cross,the ${F_2}$ generation consists of $16$ possible combinations of gametes.Among these,the pure homozygous genotypes are $YYRR$,$YYrr$,$yyRR$,and $yyrr$.However,in the standard Mendelian dihybrid cross (e.g.,$YYRR 	imes yyrr$),the pure homozygous offspring produced in the ${F_2}$ generation are specifically the parental types: $YYRR$ $(1)$ and $yyrr$ $(1)$.Total number of pure homozygous offspring = $1 + 1 = 2$.Total number of offspring = $16$.Fraction of pure homozygous offspring = $\frac{2}{16} = \frac{1}{8}$.

Pure homozygous offspring in a dihybrid cross in the ${F_2}$ generation will be:

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