Chapter 5, Problem 2P

In a diploid species of plant, the genes for plant height and fruit shape are syntenic and separated by $\text{18}$ m.u. Allele D produces tall plants and is dominant to d for short plants, and allele R produces round fruit and is dominant to r for oval fruit.

A plant with the genotype $\text{DR/dr}$ produces gametes. Identify gamete genotypes, label parental and recombinant gametes, and give the frequency of each gamete genotype.

Give the same information for a plant with the genotype $\text{Dr/dR}$.