Twins who develop from separate eggs are known as what?

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Study for the Biological Bases of Behavior Test. Utilize flashcards and multiple-choice questions with detailed hints and explanations to ace your exam with confidence!

Multiple Choice

Twins who develop from separate eggs are known as what?

Explanation:
When two eggs are released and fertilized by two different sperm, two separate zygotes form. This leads to fraternal twins (dizygotic), who are genetically no more similar than regular siblings and can be different sexes. This contrasts with identical twins, which come from one fertilized egg that splits into two individuals who are genetically the same. Conjoined twins arise when the embryo’s division is incomplete. So developing from separate eggs uniquely identifies them as fraternal twins.

When two eggs are released and fertilized by two different sperm, two separate zygotes form. This leads to fraternal twins (dizygotic), who are genetically no more similar than regular siblings and can be different sexes. This contrasts with identical twins, which come from one fertilized egg that splits into two individuals who are genetically the same. Conjoined twins arise when the embryo’s division is incomplete. So developing from separate eggs uniquely identifies them as fraternal twins.

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