In a cross in Drosophila, a female heterozygous for the autosomally linked genes a, b, c, d, and e… Show more In a cross in Drosophila, a female heterozygous for the autosomally linked genes a, b, c, d, and e (abcde/+++++) was testcrossed with a male homozygous for all recessive alleles. Even though the distance between each of the loci was at least 3 map units, only four phenotypes were recovered, yielding the following data: Phenotype Frequency +++++ 440 abcde 460 ++++e 48 abcd+ 52 Why are many expected crossover phenotypes missing? Can any of these be mapped from the data given here? If so, determine the map distances. • Show less