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Answered 2009-11-15 23:26:11

Fraternal twins can be either boys or girls, or a combination of one girl, one boy. They are different from identical twins, who share the same DNA and must be the same gender. Fraternal twins have their own unique DNA and while they may look similar, they are not identical in appearance.

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Are fraternal twins never the same sex?

Fraternal twins can be the same sex or opposite sexes. It doesn't matter.

Can faternal twins be the same gender?

They can be. While identical twins always have to be the same gender, fraternal twins usually are not. However this is not always the case. Identical twins occur because they inhabit the same egg. Fraternal twins because two eggs were fertilized at the same time. So fraternal twins could be the same gender, but usually they are of the opposite gender.

What is it called when twins are different genders?

Fraternal twins. Fraternal twins can be the same gender too, but since they are produced from two eggs from the mother, they are not identical.

Why can fraternal twins be different genders but identical are the same gender?

Because - fraternal twins are formed from two separate eggs, which have been fertilized simultaneously. Identical twins are formed from a single egg.

Twins formed by the fertilization of two ova by two sperm are?

They would be fraternal twins. Identical twins are created when one sperm fertilized one egg, and hat egg then splits in two. Identical twins are always the same gender, while fraternal twins can be either gender, or a mix of the two.

Why do fraternal twins don't have to be of the same sex?

Unlike identical twins, fraternal twins come from two separate eggs each getting fertilized by a separate sperm. Now these sperms can both carry an X chromosome or a Y chromosome giving rise to fraternal twins of the same gender. But at times one could carry the X chromosome and the other could carry the Y chromosome resulting in twins of opposite gender.

What are indentical twins?

Identical twins, or in-fraternal twins, are the offspring that look exactly alike and are of the same gender, sharing the same exact genetic information. In-fraternal twins occur when a fertilized ovum (egg) has divided and each went on to become an embryo containing exact same genetic information.

Why do you think identical twins were more alike than fraternal twins?

Fraternal twins share most of their genetic material, by virtue of having the same parents. Identical twins, however, by definition share 100% of their DNA. This means, for example, that identical twins cannot ever be one of each gender, as fraternal twins often are.

Do fraternal twins have the same fingerprints?

No, fraternal twins do not have the same fingerprints, because everyone no matter what has different fingerprints. not even twins.

Why can fraternal twins be a different gender but identical twins are the same gender?

Identical Twins are the result of a single fertilized egg spliting in two producing two genetically identical children. Fraternal twins are the result of the mother producing two eggs each fertilized by a different sperm from the father. This can result in opposite sex twins.

Do fraternal twins come from the same egg?

No, identical twins do, but fraternal twins come from 2 separate eggs.

What are fraternal twins?

Fraternal twins are two siblings that have the same birth day, but do not look identical.

How can you tell when babies are fraternal twins and identcal twins?

Fraternal twins are the product of two separate combinations of ovum and sperm at the same time, resulting in genetically different children with a shared womb.Identical twins are the result of one ovum-sperm combination, which then splits into two separate children who are genetically identical.If the two children born from one pregnancy are genetically near 100% identical (with consideration for mutations and genetic alterations after the split or post-natal), they are identical.If the two children have closer to normal sibling genetic similarity (around 50%) but just share a birth time, they are fraternal.Also, identical twins share the same gender. If twins are of different gender, they must be fraternal (though fraternal twins can be same gender as well).

What is the difference between fraternal and identical twins?

identical twins are born at the same time AND look the same l. Fraternal twins are born at the same time but do not look identical..

Do fraternal or identical twins have the same DNA?

Identical twins do not have the same DNA; it is quite similar, but not exact. fraternal twins are no more similar than sibling likenesses.

Are fraternal twins identical?

No that's why theyre called fraternal twins. Identical twins are identical (share the exact same genes) while fraternal twins are as similar to each other as normal siblings are.

Do fraternal twins have the same genotype?

No, the genotype of fraternal twins is no more similar than any two siblings.

What is the difference identical and fraternal twins?

Identical twins come from the same fertilized egg; fraternal twins come from 2 fertilized eggs.

Why do fraternal twins have their own placenta?

Fraternal twins are really two siblings who happen to be born at the same time from the same mother. They each have their on placenta.

Why are identical twins and fraternal twins not the exact same?

Identical twins are formed from a single egg that splits into two. Fraternal twins are formed from two separate eggs that are both separately fertilized. So identical twins have identical DNA, and fraternal twins do not.

What are MZ and DZ Twin Pairs?

MZ twins are identical twins that share 100% of the same DNA. DZ twins share only 50% of their DNA (fraternal twins). MZ twins are always the same gender, whereas DZ twins can be the same gender or one male and one female. DZM would be the male pairing of DZ twins, DZF is the female pairing, and DZO is when there is a male and a female.

Can conjoined twins be male and female?

No. Conjoined twins are always identical twins, and never just fraternal twins. Identical twins come from a single embryo that splits. In the case of conjoined twins, a complete split never occurs. So when they come from the same embryo, they are always the same gender.

What are unidentical twins called?

How do fraternal twins form? Answer one egg from each ovary is fertilized.

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