How can one have identical twins?
There are two primary types of twins, Identical and Fraternal.
Identical twins occur when the egg splits after fertilization. To date no indication of a genetic link has been found. Anyone has a chance, though small, of having identical twins.
Fraternal twins occur when more than one egg is dropped during ovulation. This trait can be inherited from the mother's side of the family. Studies have shown that the chances are also increased by being overweight or older.
What are the chances of having twins if your fiance is an identical twin and you have identical twin great aunts on your father's side?
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.
It depends on the type of twins If It was identical (monozygotic) twins, one egg is fertilized (As you can see, identical twins have similarity in phenotype (the observable characteristic of an organism) because of development of one zygote divided into two embryos) but if it was non-identical twins, two eggs or more (such as triplets or quadruplets) are fertilized. The twins have differences in phenotype
Identical twins have the same genotype because they have the exact same genes. Identical twins are formed when one fertilized egg (zygote) splits in two and each of the now two zygotes each develop into different beings. Identical twins are therefore referred to as monozyygotic twins and they have the same DNA.
Yes. Conjoined twins are always identical (monozygotic) twins, and identical twins are always the same sex. There is a theoretical case where identical twins could be opposite genders, when the babies are female but in one of the females, a branch of one X chromosome breaks away; however, I don't believe this has ever been observed.
There are two two kinds of twins. Gametic twins - two sperms fuse with two eggs to form gametic twins. In the case of gametic twins, the twins are not identical and infact there is a chance for one male and another female. Zygotic twins - zygote forms after fertilisation (Fusion of sperm and egg). The zygote divides in to two cell and these two new cells develops in to twins. In the case of…
Identical twins are formed when one sperm fuses with one egg cell and results in a zygote as the normal procedure is, then this ball of cell divides into two to give two genetically identical masses of cells which then grow independently, all by themselves. Usually between the identical twins one is much healthier than the other A single egg is fertilised
If atleast one person in your family has identical twins what are your chances of having identical twins and does someone in your family have to have had twins for you to be able to have twins?
The chance of having non-identical twins can run through genetics or be affected by the age of the mother. So the more people in your family tree that have twins, the more likely you are to have twins. However, twins can occur by chance, to someone who's family tree has no cases of twins, or from IVF. You do not have to have twins in your family line to give birth to twins. The chance…
Fraternal twins (dizygotic twins) are simply two fertilized eggs that are implanted in the uterus at the same time. Identical twins (monozygotic twins) is one fertilized egg that separates into two embryos. In most cases, identical twins share one placenta, but have separate amniotic sacs. In some cases, they have two placentas. In rare cases, they share both the placenta and the amniotic sac.
To be strict, if you look real close, they haven't. But their genes are very, very similar. And the why is because identical twins start out as one fertilized egg that splits and produce two babies. One fertilized egg, one set of genes. Identical twins have the same DNA because they were created when a fertilised egg split in half - so they are two identical copies of the original. Identical twins have different fingerprints…