Question

question 10
2 pts
which of the following results in identical twins?
○ none of the choices are accurate
○ release of 2 eggs fertilized by different sperm
○ division of fertilized egg into 2 embryos
○ trisomy of 21 chromosome

Explanation:

To determine the cause of identical twins, we analyze each option:

• "none of the choices are accurate" is incorrect as there is a correct option.
• "release of 2 eggs fertilized by different sperm" results in fraternal (dizygotic) twins, not identical.
• "division of fertilized egg into 2 embryos" is the correct mechanism for identical (monozygotic) twins, as they share the same genetic material from the single fertilized egg (zygote) that splits.
• "trisomy of 21 chromosome" causes Down syndrome, not identical twins.

Answer:

division of fertilized egg into 2 embryos