Question

i)What are twins ? Explain two types of twins.
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Answer 1

Answer:

There are two types of twins – identical (monozygotic) and fraternal (dizygotic). To form identical twins, one fertilised egg (ovum) splits and develops two babies with exactly the same genetic information.

Explanation:

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Answer 2

Answer:

Identical and fraternal twins are the most common, but there are also several other rare types

Explanation:

Identical twins are also called monozygotic twins, meaning one fertilized egg. They occur when one egg is fertilized by one sperm as usual, but the egg splits in two shortly afterward. Each half then grows into a baby.

Fraternal twins

The other name for fraternal twins is dizygotic twins, meaning two fertilized eggs. They’re the result of the mother releasing two eggs at the same time with each egg being fertilized by a different sperm.

Because they come from different eggs and sperm, they only share about 50 percent of their chromosomes like any other siblings. This means they can be the same or different sexes and aren’t identical.