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).