In the image (Figure 4.24) the affected male (A) shows a cross section of a sperm's flagella that has tissue damage. The image shows less darkened areas indicating that the bacteria causing the infection has damaged the dynein protein that would get the flagella to move/propel the sperm. The unaffected male (B) shows a cross section of a sperm that we must assume has normal dynein functioning and clearly shows a greater area of darkness, indicating normal flagella function due to normal dynein function.
Work Step by Step
See answer above.