Battle of the Sex Chromosomes

March 18, 2025
Read time: <5 mins
Sperm Egg Fertilisation Swimming Cell

In evolutionary terms, fitness refers to an organism’s ability to survive and pass on its genes. A study from the University of Michigan explored the competition between X and Y chromosome-linked genes in mice, revealing how this competition influences offspring sex ratios. The researchers uncovered a fascinating mechanism behind this process that could change how we think about evolutionary arms races—one you’ll want to learn more about.

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