write short note on twins. (note: please write aleast five points
Answers
Answer:
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.
They happen when two ova are released from the ovary at the same time, and each is fertilized by a different sperm. This results in the birth of fraternal twins.
Twins can develop from one ovum (egg) or from two ova (eggs). Twins who develop from a single ovum are called monozygotic or identical twins.
Monozygotic twins are formed when one zygote, created with one egg and one sperm, splits into two. Instead of having just one embryo—which is usually what you get from one egg and one sperm—the result is two embryos. Each of those embryos develops as a separate fetus.
Monozygotic twins are also known as identical twins because they practically share identical genes. However, they are not exactly genetically identical. While we once thought mono-twins were genetically identical, with the science we have today, the name may no longer be accurate.