Questions: Twins who are the result of a single fertilized egg are Fraternal twins Monozygotic twins Dizygotic twins Heterozygous twins

Twins who are the result of a single fertilized egg are Fraternal twins Monozygotic twins Dizygotic twins Heterozygous twins
Transcript text: Twins who are the result of a single fertilized egg are $\qquad$ Fraternal twins Monozygotic twins Dizygotic twins Heterozygous twins
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Solution

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The answer is the second one: Monozygotic twins.

Explanation for each option:

  1. Fraternal twins: Incorrect. Fraternal twins, also known as dizygotic twins, result from two separate eggs being fertilized by two separate sperm cells. They are genetically similar to regular siblings.

  2. Monozygotic twins: Correct. Monozygotic twins, also known as identical twins, result from a single fertilized egg that splits into two embryos. They share the same genetic material.

  3. Dizygotic twins: Incorrect. Dizygotic twins are another term for fraternal twins, which result from two separate fertilized eggs.

  4. Heterozygous twins: Incorrect. The term "heterozygous" refers to having two different alleles for a particular gene, and it is not used to describe a type of twin.

In summary, twins who are the result of a single fertilized egg are called monozygotic twins.

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