Why Are Mules Sterile?

Answer

A mule is a crossbreed between a donkey stallion (called a jack) and a horse mare. Both male and female mules have all the correct ‘parts’ but they are sterile and cannot reproduce. Very few (about 1 in 1 million) mare mules have had foals. Mules are thought to be sterile due to the chromosome (genetic material) make up of their parents.
2 Additional Answers
Most mules are sterile because they are off the offspring of a horse and a donkey, so they do not provide enough chromosomes in their DNA to create life.
Mules are sterile because they are a hybrid. They are a mix of a male donkey, or jack and a female horse. A hybrid animal typically cannot reproduce. You can find more information here: http://www.lovelongears.com/about_mules.html
Q&A Related to "Why Are Mules Sterile?"
A mule is what you get when you cross a horse with a donkey. Mules are sterile because the number of chromosomes from the two parents don't match. You can find more information here
http://answers.ask.com/Science/Agriculture/why_are...
Mules are sterile since they are a hybrid of a horse and a donkey: whenever members of two different species reproduce, their offspring(that is, IF they produce offspring, and there
http://wiki.answers.com/Q/Why_are_mules_sterile
The sterility of a mule is accredited to the difference in the numb...
http://www.chacha.com/question/why-is-a-mule-steri...
Mules and hinnies are almost always sterile because they are from two different species of animals.
http://www.kgbanswers.com/why-are-mules-sterile/38...
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