Twins are born to a family that lives next do | vedclass

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(B) Monozygotic (identical) twins are formed from a single zygote that splits into two,meaning they must have the same sex.Since the twins in this cas

Vedclass · Accepted Answer

They are fraternal twins.

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(B) Monozygotic (identical) twins are formed from a single zygote that splits into two,meaning they must have the same sex.Since the twins in this case are a boy and a girl,they cannot be monozygotic.Fraternal (dizygotic) twins are formed from two separate eggs fertilized by two separate sperm cells.Because they arise from different fertilization events,they are genetically as similar as any other siblings,sharing approximately $50\%$ of their genes.Therefore,a boy and a girl twin pair must be fraternal twins.

Twins are born to a family that lives next door to you. The twins are a boy and a girl. Which of the following must be true?

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