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WARM UP: TWINS

WARM UP: TWINS. 1) What are the 3 different types of twins? 2) How do each of these types of twins form? 3) Is it possible to have conjoined twins where one is a boy and the other is a girl?. 1) What are the 3 different types of twins?. Identical Fraternal Conjoined.

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WARM UP: TWINS

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  1. WARM UP: TWINS • 1) What are the 3 different types of twins? • 2) How do each of these types of twins form? • 3) Is it possible to have conjoined twins where one is a boy and the other is a girl?

  2. 1) What are the 3 different types of twins? • Identical • Fraternal • Conjoined

  3. 2) How do each of these types of twins form? • Identical • zygote (fertilized egg) divides and separates to become two people. • genetically identical • Fraternal • 2 eggs fertilized by 2 sperm • like normal brother and sister • Conjoined • zygote divides and begins to separate, but cells entangle / grow together.

  4. 3) Is it possible to have conjoined twins where one is a boy and the other is a girl? • No – they can ONLY be identical twins.

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