Unlike the single baby, this fertilized egg cell will split into two separate embryos, and grow into identical twins. This remarkable event takes place during the first week after fertilization, and can happen at several different times:
The stage at which the egg cell splits determines how the twins will implant in the uterine lining, and whether or not they share an amnion, chorion, and placenta. Basically, the earlier the splitting occurs, the more independently the twins will develop in the uterus. So, a pair of identical twins that split during the two-cell stage will each develop its own amnion, chorion, and placenta.
Twins that split during the late blastocyst stage will share an amnion, chorion, and placenta.
This is the case for dizygote twins, or commonly known as non-identical twins. Unlike identical twins, they could be different sexes
Only one sperm can fertilise the egg.
No it is due to slight separation through processing.
Twins that develop from a single zygote are defined as identical twins.
IDENTICAL TWINS
Fraternal twins!
They are called identical twins.
Identical twins (monozygotic) occur when a single egg, fertilized by a single sperm, splits into two identical halves. Two separate babies with identical DNA are formed. Identical twins are always the same sex and blood type. http://www.twin-pregnancy-and-beyond.com/identical-twins-or-fraternal-twins.html
The difference between Identical and Non-Identical twins is that Identical twins share the same placenta and are basically identical to one another. Non-Identical twins do not share the same placenta in the womb and two eggs fertilized at time of conception as opposed to one egg splitting in the case of Identical twins. I think that covers the basics. Hope this has clarified things for you.
no because the egg should have been fertilized , a period is when the egg hasn't been fertilized and needs to leave the body
Fraternal twins are the product of two separate combinations of ovum and sperm at the same time, resulting in genetically different children with a shared womb.Identical twins are the result of one ovum-sperm combination, which then splits into two separate children who are genetically identical.If the two children born from one pregnancy are genetically near 100% identical (with consideration for mutations and genetic alterations after the split or post-natal), they are identical.If the two children have closer to normal sibling genetic similarity (around 50%) but just share a birth time, they are fraternal.Also, identical twins share the same gender. If twins are of different gender, they must be fraternal (though fraternal twins can be same gender as well).
A zygote is formed from the egg cell contributed by the female parent and an sperm from male parent. The fertilized egg is called a zygote, therefore, zygote is definitely a part of female reproductive cell.
Identical twins come from the same fertilized egg; fraternal twins come from 2 fertilized eggs.
Identical twins come from the same fertilized egg; fraternal twins come from 2 fertilized eggs.
Identical twins are genetically the same, because they come from the same fertilized egg/sperm cell zygote, which happens to split into two viable zygotes. Fraternal twins, however, come from two different egg/sperm cell zygotes, that are concurrently fertilized and remain viable.
Dizygotic twins. If they were fertilized in the same egg, they would be called monozygotic twins.
Of course; identical twins are fertilized from the same sperm and egg, whereas fraternal twins are fertilized from different sperm and egg; thus, fraternal twins would resemble each other no more than regular siblings born at different times.
Yes. Identical twins come from one fertilized egg that has been split in two. Therefore, whatever sex the single egg would've been, the twins will be.
No, non-identical twins are fraternal twins. They are created when two eggs are fertilized at the same time and become embryos. Identical twins are when a fertilized egg splits into two on its own.
you get twins :)
No, monozygotic twins would be the same sex. Monozygotic twins come from one single fertilized egg, or zygote, which then splits to create two separate zygotes which will be genetically identical, or "identical twins", which will always be of the same gender.
The fertilized egg is divided into two fertilized eggs, and they both become twins.
Twins are identical because they come from the same egg.
No.