AP BIOLOGY

Detailed explanation-1: -Sometimes a fertilised egg splits within a few days of conception to produce genetically identical twins. Because these twins come from one zygote, they’re also known as monozygotic. Identical twins are the same sex. There are 3 types of identical twins.

Detailed explanation-2: -Identical twins are a form of asexual reproduction. The fertilizing of the egg is sexual reproduction (we’ll talk about that in a second). Once the embryo forms it splits in half creating two identical embryos. This split is asexual reproduction.

Detailed explanation-3: -To form identical or monozygotic twins, one fertilised egg (ovum) splits and develops into two babies with exactly the same genetic information. To form fraternal or dizygotic twins, two eggs (ova) are fertilised by two sperm and produce two genetically unique children.

Detailed explanation-4: -Definition. Identical twins (also called monozygotic twins) result from the fertilization of a single egg by a single sperm, with the fertilized egg then splitting into two. Identical twins share the same genomes and are always of the same sex.

Detailed explanation-5: -With identical twins, one egg is fertilized by one sperm, and the embryo splits at some later stage to become two. Occasionally, two sperm are known to fertilize a single egg; this ‘double fertilization’ is thought to happen in about 1% of human conceptions.