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If heredity is important determinant of a specific behaviour, what prediction can we make about expression of the behaviour in identical twins reared apart compared to its expression in fraternal twins reared apart ?

If heredity is important determinant of a specific behaviour, what prediction can we make about expression of the behaviour in identical twins reared apart compared to its expression in fraternal twins reared apart ? Correct Answer Identical twins will express the behaviour more similarly than fraternal twins

The passing down of characters from parents to offspring is termed heredity. Heredity is controlled by genes.

Important Points

  • Fraternal twins are also dizygotic twins, which are two babies born during the same pregnancy but the embryos developed in the womb are different. They may or may not be the same in gender or characteristics as these are two different eggs fertilized into two different embryos.
  • Identical twins or monozygotic twins take birth when a single egg splits into two embryos and they develop into babies during one pregnancy. These babies are identical to each other in every way, they have the same characters and have the same gender also. Therefore, the probability of similar behavior in identical twins reared apart will be more as compared to fraternal twins reared apart.

Thus, it is concluded that if heredity is an important determinant of specific behavior, then prediction we can make a prediction that identical twins will express the behavior more similarly than fraternal twins about the expression of the behavior in identical twins reared apart compared to its expression in fraternal twins reared apart. 

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