deficiencies encompassing part or all of the x heterochromatin of drosophila melanogaster have been linked to three abnormalities in male meiosis and spermatogenesis : x-y nondisjunction , skewed sperm recovery ratios favoring sperm with reduced chromatin content , and sterility in males carrying either a y-autosome translocation or mal ( + ) y .
C0008546
chromatin
C0596142
autosome