Part C You continue your experiments with the black mutation on chromosome II. You cross the reciprocal translocation strain to the black pure line to generate F1 flies that are both translocation heterozygotes and Bb heterozygotes. As before, you testcross F1 males and females in two separate experiments. Cross F1 males x pure black females (Note: There is no crossing over in the F1 males.) F1 females x pure black males (Note: Crossing over may occur in the F1 females.) F2 Progeny 1/2 black, fully fertile 1/2 wild-type, semi-sterile 424 black, fully fertile 426 wild-type, semi-sterile 73 black, semi-sterile 77 wild-type, fully fertile What can you conclude from these results? Select the three correct statements. What can you conclude from these results? Select the three correct statements. The F2 progeny in both experiments contain recombinants. The F2 progeny contain recombinants only when F1 females are testcrossed. None of the F2 progeny classes require crossing over. Some of the F2 progeny classes require crossing over; others do not. Chromosome II is one of the chromosomes involved in the reciprocal balanced translocation.