Question

In 1891, H. Henking studied spermatogenesis in squash bugs and observed that a specific nuclear structure was present in what percentage of the resulting sperms?

Options

• 50%

• 25%

• 75%

• 100%

Answer 1

Henking traced a specific nuclear structure through spermatogenesis and found that exactly 50% of sperms received this structure while the other 50% did not. This structure, initially named the 'X body,' was later confirmed to be a chromosome and renamed the X chromosome, establishing its fundamental role in sex determination.