In Mendel's dihybrid cross experiment,what is | vedclass

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(A) In a dihybrid cross,Mendel crossed plants with round yellow seeds $(RRYY)$ and wrinkled green seeds $(rryy)$.In the $F_1$ generation,all plants we

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$1$

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(A) In a dihybrid cross,Mendel crossed plants with round yellow seeds $(RRYY)$ and wrinkled green seeds $(rryy)$.In the $F_1$ generation,all plants were heterozygous $(RrYy)$.When $F_1$ plants were self-pollinated to produce the $F_2$ generation,a Punnett square of $16$ combinations is formed.The genotypic ratio of the $F_2$ generation in a dihybrid cross is $1:2:1:2:4:2:1:2:1$.The genotype $RRYY$ is homozygous dominant for both traits and appears only once in the $16$ possible combinations of the $F_2$ generation.Therefore,the number of offspring with the $RRYY$ genotype is $1$.

In Mendel's dihybrid cross experiment,what is the number of offspring with the $RRYY$ genotype in the $F_2$ generation?

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