Science Common Sense

1448 - What is the discovery of sex chromosomes?

The discovery of sex chromosomes happened in the early 1900s by a scientist named Nettie Stevens and another scientist, Edmund Beecher Wilson.

They were studying fruit flies and found that male and female fruit flies have different types of chromosomes. Chromosomes are like the instructions for our bodies.

They discovered that females have two X chromosomes (XX), and males have one X and one Y chromosome (XY). This difference in chromosomes determines whether we are male or female.

Their discovery helped us understand how our bodies develop and grow, and it's a fundamental part of biology and genetics.