How do identical and fraternal twins develop?

Answer 1

Identical twins form from the same fertilized egg (zygote). When the zygote has divided a few times and formed a ball of cells, something causes this embryo to split in two. Each half then goes on to develop into a person. So the twins have identical genes. A technical name for such individuals is monozygotictwins.

Fraternal (or dizygotic) twins develop from two zygotes, formed from two different eggs (ova) fertilized by two different male gametes (sperms). So they are not necessarily any more alike than any other siblings.

Answer 2

Identical twins are formed when a single fertilized egg splits into two embryos, resulting in two genetically identical individuals. Fraternal twins, on the other hand, are conceived when two separate eggs are fertilized by two different sperm, leading to siblings who share about 50% of their genetic material, like any other siblings. Both types of twins can develop in the womb and be born under similar or different circumstances.

Answer 3

Actually, identical twins are produced when an egg and a sperm join together but then divided into two.

Fraternal twins are two separate eggs fertilized by two separate sperm.

Answer 4

Identical come from the same fertilized egg

Answer 5

Same way any child develops. The only difference is that in the very earliest stages the zygote breaks in half, forming two embryos.