Identical twins are the result of:
a. One ovum fertilized by one sperm that split into two zygotes.
b. Two separate ova that were fertilized by two different sperms.
c. One ovum that was fertilized by two sperms.
d. Two ova that were fertilized by one sperm.
Answer: a. One ovum fertilized by one sperm that split into two zygotes.
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