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Why can fraternal twins be different genders but identical twins are are the same gender?
Wiki User
∙ 7y ago
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.
Waldo Ledner
Wiki User
∙ 7y agoBecause - fraternal twins are formed from two separate eggs, which have been fertilized simultaneously. Identical twins are formed from a single egg.
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Can conjoined twins be different gender?
Nature has various safety valves. That is one of them. Conjoined Twins are identical twins with a natural connective bond, therefore they always take the same sex. Fraternal twins, like the fictional Bobbseys, can be Boy and Girl.
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.
What is the difference between identical and flaternal twins?
Fraternal twins come from the fertilization of two different eggs. It can cause them to look almost the same, but they could just as easily be totally different, even different genders. Identical twins come from the splitting of only one fertilized egg, making them look exactly the same and they will always be the same gender.
Twins who delevelop in separate amniotic sacs?
They are called: fraternal or dizygotic twins. Twins who develop in one amniotic sac are called identical or monozygotic twins.
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.
Why can fraternal twins different genders but identical are always the same gender?
fraternal twins have two different chromosomes
Do identical twins with opposite genders exist?
Yes, it's possible for a mutation in the chromosome to produce otherwise-identical twins with opposite genders. But generally no, identical twins have the same gender. (but fraternal twins have different genders just as often as any siblings)
Why Can fraternal twins be different gender but identical twins are always the same gender?
fraternal twins have two different chromosomes
Can identical twins be of different sexes?
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.
Can conjoined twins be different gender?
Nature has various safety valves. That is one of them. Conjoined Twins are identical twins with a natural connective bond, therefore they always take the same sex. Fraternal twins, like the fictional Bobbseys, can be Boy and Girl.
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.
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.
What is the difference between identical and flaternal twins?
Fraternal twins come from the fertilization of two different eggs. It can cause them to look almost the same, but they could just as easily be totally different, even different genders. Identical twins come from the splitting of only one fertilized egg, making them look exactly the same and they will always be the same gender.
Twins who delevelop in separate amniotic sacs?
They are called: fraternal or dizygotic twins. Twins who develop in one amniotic sac are called identical or monozygotic twins.
Why are identical twins always the same gender?
fraternal twins have two different chromosomes
How do you know what kind of twins are when one is a girl and one is a boy?
Different gender twins will automatically be fraternal, meaning they are both from separate eggs and separate sperm. Identical twins are formed from the splitting of one fertilized egg.
Is there a different and conjoined twins?
Your question is somewhat ambiguous ( appropriate term ah so). One basic rule is that almost always, as with any identical twins, they take the same gender, either both boys or both girls. No mixed genders - like the fictional Bobbsey Twins , a boy and a girl ( Fraternal twins can be this type, but not identical or Siamese. also, generally they are conjoined at the hip, or as one Carnival Barker put it ( In the Gunsmoke posture!) There are other joining bands, also. The Girls can be beautiful
