Why do women outlive men? A study of 1,176 species points to an answer.
- Kind
- Newsletter Article
- Date
- 20251001
- Publisher
- Washington Post
- Retrieved
- Oct 1, 2025
1 meme from this reference
Heterogametic Sex Hypothesis
In mammals, including humans, sex is generally determined by the X and Y chromosomes. If a baby has a pair of X chromosomes, she’s a girl. If the baby inherits an X chromosome and a Y chromosome, he’s a boy. In birds, however, the situation is reversed. Female birds have a pair of unlike sex chromosomes while males…