Question $42$

$1$ Point

Two sibling plants inherited the dominant round peapod shape $(R)$ from one parent $("r"$ is the recessive allele$).$ When mated to a plant with wrinkled pods, sibling X$\text{'}$s progeny has all round peapods while sibling Y has $50\%$ round peapod and $50\%$ wrinkled peapod progeny. Assuming a complete dominant$/$recessive relationship between alleles, what are the genotypes of the two siblings?

both $x$ and $Y$ are RR

$x-Rr$ and $Y-RR$

both $x$ and $Y$ are rr

$x-RR$ and $Y-Rr$