Which of the following genotypes would manifest homozygous wrinkled seeds?YrYyrryR

The genotype that would manifest homozygous wrinkled seeds is "rr".

Here's why:

In genetics, the term "homozygous" refers to having two identical alleles for a particular gene. In the case of pea plants, which Gregor Mendel famously studied, seed shape (round or wrinkled) is determined by one gene that has two alleles: R for round seeds and r for wrinkled seeds.

The R allele is dominant, which means that if an organism has at least one R allele (RR or Rr), it will have round seeds. The r allele is recessive, which means that an organism must have two r alleles (rr) to have wrinkled seeds.

So, in the given options, "rr" is the only genotype that would manifest homozygous wrinkled seeds. The other genotypes (Yr, Yy, ry, R) either represent different traits (Y and y) or would result in round seeds (R).

The genotype that would manifest homozygous wrinkled seeds is "rr".

Here's why:

In genetics, the term "homozygous" refers to having two identical alleles for a particular gene. In this case, we're looking for the genotype that would result in wrinkled seeds.

In pea plants, which is where this terminology often comes up, the allele for round seeds (R) is dominant, and the allele for wrinkled seeds (r) is recessive. This means that in order for a plant to have wrinkled seeds, it must have two copies of the "r" allele - one from each parent.

So, looking at the options you've provided, the only one that fits this description is "rr". The other options either include the dominant "R" allele ("YrYy", "Rr"), or they don't include the "r" allele at all ("yR").

Therefore, the genotype "rr" would manifest as homozygous wrinkled seeds.