Final answer:
Our chromosomes are used by scientists to determine our sex.
Step-by-step explanation:
Our chromosomes are used by scientists to determine our sex. Chromosomes are thread-like structures found in the nucleus of our cells that contain our DNA, the genetic material that determines our characteristics. In humans, sex is determined by the presence of two sex chromosomes: XX for females and XY for males. By analyzing a person's chromosomes, scientists can identify their biological sex.
Learn more about chromosomes and sex determination