Introduction
Understanding the science behind the 63 chromosomes explains not only why mules are sterile but also why they possess the best traits of both worlds: the horse’s speed and grace, and the donkey’s unbreakable will. Disclaimer: This article is for informational purposes. If you are considering breeding a horse with a donkey, consult a licensed large-animal veterinarian to discuss the risks of dystocia, size matching, and genetic testing. Horse Mating Donkey
However, when a mule (63 chromosomes) tries to reproduce, the cells contain . The 31 donkey chromosomes cannot align perfectly with the 32 horse chromosomes. They form "univalents" (chromosomes without a partner). Consequently, the mule’s body cannot produce viable sperm or eggs. and genetic testing. However