A homozygous variety of maize with red leaves and normal seeds was crossed with another homozygous variety with green leaves and tassel seeds (both recessive alleles). The F1 hybrids were then crossed to the green, tassel-seeded variety, and the following offspring were obtained: red, normal 124; red, tassel 126; green, normal 125; green, tassel 123.a. What is the recombination frequency between these two genes?b. Can you definitely say that the genes for plant color and seed type are linked or unlinked? Explain.