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How Are Fraternal Twins Different from Identical Twins

Question 39

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How are fraternal twins different from identical twins?


A) Fraternal twins develop from one egg; identical twins develop from two eggs.
B) Fraternal twins are monozygotic; identical twins are dizygotic.
C) Fraternal twins have all the same genes; identical twins do not have all the same genes.
D) Differences between identical twins are due to the environment; differences between fraternal twins may be due to either environment or genes.

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