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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.
What is one way in which identical and fraternal similar?
Identical and fraternal twins typically share many similar characteristics
What is the definition for fraternal twins?
Fraternal twins started from two separate eggs in the mother. By comparison, identical twins started from one egg but it divided at the first stage of development into two separate zygotes (and thus two separate babies).
I'm pregnant with twins. How do I know if I'm having identical or fraternal twins?
The ultrasound can determine if they are fraternal or identical. If they are identical then they will share a placenta and they may even share an amniotic sac. If they are fraternal they will have separate placentas. Sometimes it is difficult to see because of the membrane but the ultrasound is sophisticated and they normally can tell.
What is another name for fraternal twins?
Another name for fraternal twins is dizygotic twins.
Can fraternal twins share one placenta during pregnancy"?
Yes, fraternal twins can share one placenta during pregnancy.
Do fraternal twins share a placenta?
Yes, fraternal twins can share a placenta if they are from the same fertilized egg that split into two embryos.
Can fraternal twins share a placenta?
Yes, fraternal twins can share a placenta if they are from the same fertilized egg that split into two embryos. This is known as a monochorionic pregnancy.
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.
Are female twins that are not identical called Fraternal or Maternal?
Female twins that are not identical are called fraternal twins. Fraternal twins occur when two separate eggs are fertilized by two separate sperm. Maternal twins refer to twins that share the same mother but can include both identical and fraternal twins.
What is one way in which identical and fraternal similar?
Identical and fraternal twins typically share many similar characteristics
Psychologists use what to determine the role that heredity and the environment play in determining trait?
Psychologists use twin and adoption studies to determine the role of heredity and environment in determining traits. By comparing similarities between identical twins (who share 100% of their genes) and fraternal twins (who share 50% of their genes), researchers can estimate the relative contributions of genetics and environment to certain traits.
Do twins share the same placenta?
No, twins can either share the same placenta (monochorionic) or have separate placentas (dichorionic), depending on whether they are identical or fraternal twins.
Why might genetically identical twins have different phenotype?
This is because fraternal twins are simply two full siblings that happen to share the womb at the same time. There is no more reason for fraternal twins to be the same than there is for any brother/sister, brother/brother or sister/sister sibling set to be the same.
Can twins share a placenta during pregnancy"?
Yes, twins can share a placenta during pregnancy. This occurs when identical twins share a single placenta, while fraternal twins each have their own placenta.
What type of study would a psychologist conduct to determine how much of a trait is influenced by genetics?
A psychologist would conduct a twin study to determine the heritability of a trait. By comparing the similarities between identical twins (who share 100% of their genes) with fraternal twins (who share 50% of their genes), researchers can estimate the genetic contribution to the trait.
How do you know if two twins are identical or just fraternal twins that look a lot alike?
The only way to definitively determine if twins are identical or fraternal is through genetic testing. Identical twins share 100% of their DNA, while fraternal twins share about 50% on average, just like regular siblings. Physical similarities alone are not enough to distinguish between the two types of twins.
