Following a Series of Two-Point Testcrosses in Neurospora, 200 Tetrads

Multiple Choice

Following a series of two-point testcrosses in Neurospora, 200 tetrads were analyzed. Of these, 100 were PD and 100 were NPD. These two genes are

A) 50 map units apart on the same chromosome.
B) 100 map units apart on the same chromosome.
C) epistatic.
D) on different chromosomes.
E) adjacent to each other on the same chromosome.