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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.
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.
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.
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.
Similar twins are true twins or not?
i would have to say no because i am an identical twin and when you hear twin you think of identical ones. also fraternal twins aren't really twins because they are 2 separate babies that just happened to be fertilized at the same time.
How do identical and fraternal twins develop?
Identical twins form from the same fertilized egg (zygote). When the zygote has divided a few times and formed a ball of cells, something causes this embryo to split in two. Each half then goes on to develop into a person. So the twins have identical genes. A technical name for such individuals is monozygotictwins.Fraternal (or dizygotic) twins develop from two zygotes, formed from two different eggs (ova) fertilized by two different male gametes (sperms). So they are not necessarily any more alike than any other siblings.
Why can an egg or sperm cell alone develop into a new individual?
A sperm or egg alone can not develop into a new individual. Only an egg fertilized by a sperm does.
Why are twins formed in one embryo?
Twins are formed when a fertilized egg divides into two embryos early in development. These embryos can develop into identical twins if they split before any differentiation occurs. Fraternal twins occur when two eggs are fertilized by two separate sperm, leading to separate embryos.
What develops from two eggs and two sperms?
Fraterna twins, or dizygotic twins, develop when two separate eggs are fertilized by two different sperm. Each twin will have its own genetic makeup and placenta.
How are identical twins genetically from fraternal twins?
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.
What The scientific name for fraternal twins.?
Identical twins are called monozygotic. Fraternal twins are called dizygotic.
How Do Fraternal Twins Occur and Identical Twins Occur?
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.
