Question

The variation of kernel color in corn plants is an inherited trait. R is the dominant allele for red kernels in a corn plant and r is the recessive allele for yellow kernels. What is the probability that a corn plant with the genotype Rr crossed with a corn plant rr will have offspring with the genotype rr? Express your answer as a fraction using numerals for numbers and / for the fraction bar. Do not include spaces.

Answer 1

If you cross a heterogeneous genotype, Rr, with a homogeneous recessive genotype, rr, you get 50% of each genotype. So your fraction would be 1/2.