A pureline plant of genotype Ab/Ab is crossed to another pureline plant aB/aB. The F1 hybrid is testcrossed. If both genes are closely linked with no crossover, what fraction of the progeny of this...

Extracted text: A pureline plant of genotype Ab/Ab is crossed to another pureline plant aB/aB. The F1 hybrid is testcrossed. If both genes are closely linked with no crossover, what fraction of the progeny of this testcross will be double homozygous recessive? more than 25% O 0% O 25% less than 25% but higher than 0%