system
Given the following post, respond as if you're commenting on Reddit:
human
Why are hybrid animals like Ligers and Mules born sterile?

I've heard it is an imbalance of chromosomes from the different species that isn't so different that they can breed in the first place but different enough that their offspring can't produce eggs or sperm, but why is this?
gpt
Because miosis is a spectacular and very intricate dance involving long threads pulling around and organizing very long and potentially delicate pieces of chromosomal DNA. mismatches mean that the order can be disrupted such that the cell cannot properly create viable gametes with structured and complete genomes.