Twins are born. One is a boy and one is a girl. Which statement is correct about their genetic makeup?

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asked Dec 18, 2022 168k views

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Ilia Kurtov · Answer 1 · 2022-12-23T17:01:41+0000

Answer:

If twins are a boy and a girl, clearly they are fraternal twins, as they do not have the same DNA. A boy has XY chromosomes and a girl has XX chromosomes. Girl-boy twins occur when one X egg is fertilized with an X sperm, and a Y sperm fertilizes the other X egg.

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Twins are born. One is a boy and one is a girl. Which statement is correct about their genetic makeup?

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