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Why are some twins identical and some not?
The reason why some twins are identical and some are not starts in utero. Identical twins occur when one egg is fertilized and it splits to create two embryos. Nonidentical twins come from different fertilized eggs.
Do twins have two placentas?
Yes, twins can have two placentas, one for each baby. This is more common in fraternal twins, who develop from two separate eggs fertilized by two different sperm. Identical twins, who develop from a single fertilized egg that splits into two embryos, can sometimes share a single placenta.
What is the difference between dizygotic twins and monozygotic twins?
Dizygotic twins develop from two separate ova fertilized by different sperm at roughly the same time, they are also called fraternal twins. Monozygotic twins develop from one zygote that splits apart producing genetically identical zygotes; also called identical twins.
If twins aren't identical what are they called?
Twins who are of the opposite sex or do not look alike are fraternal twins ~ not identical. This means that at the time of their conception ~ two eggs were fertilised. In the case od identical twins, one egg is fertilised and split in half.
Is it possible for a woman to have twins from two different fathers"?
Yes, it is possible for a woman to have twins from two different fathers. This rare phenomenon is known as heteropaternal superfecundation. It occurs when a woman releases multiple eggs during ovulation and has sexual intercourse with different partners within a short timeframe. Each egg can be fertilized by sperm from a different man, resulting in twins with different biological fathers.
Has twins ever been born in two different years?
Twins have never been born in two different years.
Why Can fraternal twins be different gender but identical twins are always the same gender?
fraternal twins have two different chromosomes
Do identical twins develop from two different eggs that are fertilized by different sperm?
No, fraternal twins do.
Why can fraternal twins different genders but identical are always the same gender?
fraternal twins have two different chromosomes
How may types of twins are there and which type may have different sex?
There are two types of twins -- monozygotic ("identical") from a single egg, and dizygotic (fraternal) from two eggs. Only dizygotic twins can have a different sex.
What do you call identical twins that develop from two different eggs that are fertilized by different sperm?
That isn't possible: if the twins are from two different eggs, fertilized by different sperm, then they will not be identical. It's genetically impossible.
What is sentence of appearance?
the two twins had different appearance.
Why are some twins identical and some not?
The reason why some twins are identical and some are not starts in utero. Identical twins occur when one egg is fertilized and it splits to create two embryos. Nonidentical twins come from different fertilized eggs.
Why do some twins look different?
Fraternal twins occur when two fertilized eggs are implanted in the uterine wall at the same time. When two eggs are independently fertilized by two different sperm cells, DZ twins result. The two eggs, or ova, form two zygotes, hence the terms zygotic and biovular.Identical twins occur when an egg splits into two; which makes them identical. Identical twins are not hereditary like fraternal twins can be. It is complete coincidence.
Twins who delevelop in separate amniotic sacs?
Twins who develop in separate amniotic sacs are known as dizygotic or fraternal twins. This means they were conceived from two separate eggs fertilized by two different sperm cells. Dizygotic twins can have different genetic makeup and are no more similar than siblings born at different times.
How do you have twins with different father?
Your body released two eggs that were fertilized by sperm from two different men.
Are the olson twins futurnal?
They are not fraternal twins (two different fertilized eggs implanted), they are identical twins (one single fertilized egg which divide into two separate embryos)
