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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 else can I help you with?
What is combination of chromosomes XY for fraternal twins?
If two fraternal twins have the XY sex chromosomes, they will be male.
Do conjoined twins have the same sex?
Yes. Conjoined twins are always identical (monozygotic) twins, and identical twins are always the same sex.There is a theoretical case where identical twins could be opposite genders, when the babies are female but in one of the females, a branch of one X chromosome breaks away; however, I don't believe this has ever been observed.
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.
How do fraternal twins from?
Fraternal twins, or dizygotic twins, form when two separate eggs are fertilized by two different sperm cells during the same menstrual cycle. This results in two genetically unique siblings who share about 50% of their DNA, similar to regular siblings. Fraternal twins can be of the same sex or different sexes and may or may not look alike. Factors such as maternal age, genetics, and the use of fertility treatments can influence the likelihood of having fraternal twins.
Does 2 sacs and one placenta mean fraternal twins?
I am pretty sure because that is how my twins are at the moment that one placenta and two sacs mean identical twins more often than fraternal and more often identical if they are the same sex
Are fraternal twins never the same sex?
Fraternal twins can be the same sex or opposite sexes. It doesn't matter.
What are the odds of same sex in twin pregnancy?
The odds of having same-sex twins in a twin pregnancy are approximately 25%. This is because identical twins (monozygotic) are genetically the same and will always be the same sex, while fraternal twins (dizygotic) can be either the same sex or different sexes. Since fraternal twins are produced from two separate eggs fertilized by two separate sperm, they have a 50% chance of being the same sex. Overall, the combination of these factors results in the approximately 25% odds of same-sex twins.
Was Shakespeare's twins identical?
No. All identical twins are the same sex. Judith and Hamnet were opposite sexes, and so were fraternal twins.
What is combination of chromosomes XY for fraternal twins?
If two fraternal twins have the XY sex chromosomes, they will be male.
Do conjoined twins have the same sex?
Yes. Conjoined twins are always identical (monozygotic) twins, and identical twins are always the same sex.There is a theoretical case where identical twins could be opposite genders, when the babies are female but in one of the females, a branch of one X chromosome breaks away; however, I don't believe this has ever been observed.
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.
If a boy and a girl are twins are they faternal twins or twins?
If a boy and a girl are twins, they are known as fraternal twins. Fraternal twins result from the fertilization of two separate eggs by two separate sperm cells, whereas identical twins result from the fertilization of a single egg by a single sperm cell that later splits into two embryos.
What are twins that dont look alike caled?
Fraternal. They develop from separate ova and are not genetically identical, so look different, can have different sex etc. Unlike "identical twins."
How do fraternal twins from?
Fraternal twins, or dizygotic twins, form when two separate eggs are fertilized by two different sperm cells during the same menstrual cycle. This results in two genetically unique siblings who share about 50% of their DNA, similar to regular siblings. Fraternal twins can be of the same sex or different sexes and may or may not look alike. Factors such as maternal age, genetics, and the use of fertility treatments can influence the likelihood of having fraternal twins.
If twins aren't identical what are they called?
Twins who are of the opposite sex or do not look alike are fraternal twins ~ not identical. This means that at the time of their conception ~ two eggs were fertilised. In the case od identical twins, one egg is fertilised and split in half.
Are all conjoined twins same sex?
No, not all conjoined twins are the same sex. While most conjoined twins are identical and share the same sex due to their identical genetic makeup, there are rare cases where conjoined twins can be fraternal, resulting in one twin being male and the other female. The occurrence of conjoined twins is quite rare, and the sex combination can vary depending on the type of twinning that occurs.
