A Sterile Mule is Produced by Mating a Horse and a Donkey.From

Question

A sterile mule is produced by mating a horse and a donkey.From this observation you could conclude
A) increasing the number of mules in a population will affect the allele frequency in the next generation.
B) that horses and donkeys are different species.
C) that horses and donkeys are the same species.
D) that mules are a result of macroevolution.
E) the DNA sequences of horses and donkeys are more than 97% identical.

Accepted Answer

The fact that a mule is sterile suggests that horses and donkeys are different species, as they are unable to produce viable offspring. This is an example of reproductive isolation, which is one of the key criteria used to define species. The other answer choices are not necessarily supported by this observation.