2024年7月29日 · What looks like fraternal twins to medical professionals is actually identical twins! The only way to figure this out for sure is to do a DNA test. Fraternal twins will have similar DNA like in regular siblings, whereas identical twins will have identical DNA markers.

2015年10月1日 · Yes, it is possible for same-sex fraternal twins to look extremely similar. Like any siblings, fraternal twins are the products of two separately fertilized eggs from the same mother and father. They are genetically as similar as other non-twin siblings.

2019年11月7日 · The best way to determine if twins are identical or fraternal is by examining each child’s DNA. Occasionally a family is told that their twins are fraternal based on placenta findings, when they are in fact identical.

2023年4月25日 · Most twins are fraternal or identical, but a third type, polar body twins, might exist too. Some other subtypes exist, but these are extremely rare. Many occur under unusual circumstances.

2024年7月30日 · Monozygotic twins, or identical twins, come from a single egg and sperm that splits into two after conception. Fraternal twins share half of their genomes, like any other siblings, and they...

Can Fraternal Twins Be Identical? There is a minimal chance that fraternal twins will look identical. This can be because they are the same age and are closely related. Think of having non-twins; looking back at their baby pictures around the same age, they may look very similar, but now that they are older, they may look completely different.

2025年1月6日 · Fraternal twins occur when two separate eggs are fertilized by two separate sperm during the same pregnancy. Unlike identical twins, fraternal twins share only half of their genomes. “They’re two entirely different embryos with their own unique genetic material,” Stanhiser clarifies.

2025年2月4日 · According to the National Institutes of Health Opens a new window, identical twins occur in 3 to 4 per 1,000 births worldwide. Usually, identical twins share a placenta and have their own amniotic sacs. Because they come from the same egg and sperm, identical twins are the same sex and have almost exactly the same DNA.

So, fraternal twins come from two separate eggs and sperms, while identical twins come from one egg and sperm that split into two. They have their own special ways of forming and looking, and it’s really interesting to learn more about them!

2024年11月12日 · Unlike identical twins, which develop from the same egg that divides in two, fraternal twins don't share exactly the same genetic material. That's why fraternal twins don't look identical, and can be boy/girl rather than just girl/girl or boy/boy.