can human fraternal twins have different fathers?
318362
Unsourced material may be challenged and removed. Superfecundation is the fertilization of two or more ova from the same cycle by sperm from separate acts of sexual intercourse, which can lead to twin babies from two separate biological fathers.
215258
Fraternal twins are considered “dizygotic,” and that's when two separate eggs are fertilized by a two different sperm. “Each twin has his or her own placenta and amniotic sac. ... It seems like twins develop a bond long before they grace us with their presence in this world — whether they're identical or fraternal.
1321772
It all started when two sperm fertilized an egg at the exact same time. Twins can be fraternal, identical — and in extremely rare cases — semi-identical. ... Because identical twins share all of their genes, they can't be of opposite sexes like fraternal twins can.
1245975
Yes - twins can be conceived at separate times and even by separate fathers, but only within a few hours or days in-between. Fraternal twins are the result of two eggs being present and fertilized to gestate concurrently.
942861
They May Not Look and Act Alike Fraternal twins, on the other hand, are as alike as any two siblings. They may look very different. They can have different hair color, eye color, stature, and personalities.
1119540
Fraternal twins develop when two separate egg cells get fertilized by two separate sperm cells. On the other hand, paternal twins develop when one sperm fertilizes one egg. Paternal and fraternal twins are also known as monozygotic and dizygotic twins.
644752
Your chances of having fraternal twins may be higher if you're a fraternal twin yourself or if fraternal twins run on your mom's side of the family. ... (It can also happen once in a while in women who don't regularly release more than one egg or have twins in their family, though.)
1202785
Having identical twins is not genetic. On the other hand, fraternal twins can run in families. Genetics can definitely play a role in having fraternal twins.
69549
If your first set of twins were fraternal, then your chances of having another set of fraternal twins is multiplied by four! That's 1 in 12! If your first set of twins were identical, then your chances of having another set of identical twins drops way down to 1 in 70,000 or so.
446741
Identical twins or triplets have the same genetic identity, are always the same sex, and look almost exactly the same. Fraternal multiples develop from separate eggs that are each fertilized by a different sperm.
543340
The chances of having identical twins is relatively rare: 3 or 4 per every 1,000 births. Fraternal twins result when two different eggs are fertilized, each by a different sperm cell. This can happen when a woman produces several eggs (most often two) at the same time. This is called hyperovulation.
912498
Identical twins have 100% of their DNA the same while fraternal twins share only 50%. ... Fraternal twins are really just siblings who share the same womb. Each starts out as a separate egg fertilized by a separate sperm. They don't share any more DNA than do any two siblings.
288702
Chromosomes from the father's sperm determine gender: XX for a girl and XY for a boy. 2﻿ As a result, the chances of fraternal twins resulting in boys, girls, or a combination are the same as for any other baby. Monozygotic—identical—twins, on the other hand, are always the same gender, either two girls or two boys.
1248226
Identical twins do not run in families; rather, they are random. ... Additionally, girl/boy twins are always fraternal. Experts also associate fertility treatments with an increased number of multiple births and twins. This can lead to the conception of fraternal twins as a result of the fertilization of two eggs.
266990
Though fraternal twins are together even in the womb, they are as genetically alike as any other normal brother and sister. That is, they don't necessarily share the exact same features as their twin, like most identical twins do.
149686
Every twin has their own spirit, but there are difference between those of fraternal and identical twins. The spirits of fraternal twins have no closer relationship than those of any siblings. ... Identical twins have twin spirits; they experience many of their lifetimes together, always as identical twins.
775725
Same-sex twins with separate placentas can be fraternal or identical. For health reasons, it's good to know whether your twins are fraternal or identical. To find out whether twins are identical or fraternal, you can ask for a genetic test after your babies are born.