In the F_2 generation of a dihybrid cross,how | vedclass

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(D) In a dihybrid cross (e.g.,$RRYY 	imes rryy$),the $F_1$ generation is heterozygous $(RrYy)$.When $F_1$ plants are self-crossed $(RrYy 	imes RrYy)

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(D) In a dihybrid cross (e.g.,$RRYY 	imes rryy$),the $F_1$ generation is heterozygous $(RrYy)$.When $F_1$ plants are self-crossed $(RrYy 	imes RrYy)$,the $F_2$ generation produces a phenotypic ratio of $9:3:3:1$.The genotypic ratio of the $F_2$ generation is $1:2:1:2:4:2:1:2:1$.The parental genotypes are $RRYY$ and $rryy$.In the $F_2$ generation,there is only $1$ plant with the genotype $RRYY$ and $1$ plant with the genotype $rryy$.Therefore,there are $2$ plants in total that possess the same genotype as the parental generation.

In the $F_2$ generation of a dihybrid cross,how many plants possess the same genotype as the parental generation?

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