A plant of genotype C/C;d/d is crossed to c/c;D/D, and the F1 is testcrossed. If
A plant of genotype C/C;d/d is crossed to c/c;D/D, and the F1 is testcrossed. If the genes in question are unlinked, the percentage of double homozygous recessive individuals in the offspring of the testcross will be: