In a diploid invertebrate, genes d and e are closely linked. single crossovers between these two genes occur only in one out of 40 meioses, and multiple crossovers are never observed. if an individual has the genotype de/de, what percentage of its gametes are expected to be recombinant (either de or de)? hint…only two of four chromatids in a tetrad would be affected by a single crossover.