Tag Archives: animals

This Is Why Ligers, Mules and Other Hybrid Animals Can’t Reproduce


“Ever wonder why mules and ligers can’t reproduce? This video by MinuteEarth, a YouTube channel that tells stories about science and the planet, explains why hybrid animals are (almost always) sterile. In short, hybrid animals are infertile because they don’t have viable sex cells, meaning they can’t produce sperm or eggs. This is the case because the chromosomes from their different species parents don’t match up. Non-hybrid animals’ normal body cells contain two copies of each chromosome—one from the mother, and one from the father. During mitosis, or cell division, these sets of chromosomes duplicate and then split off to form new cells. Sex cells, or gametes, are different in that they take each set of chromosomes from the mother … Read the rest