Opposite sex paternal twins
Chromosomes from the father's sperm determine gender: XX for a girl and XY for a boy. As a result, the chances of fraternal twins resulting in.
This Woman Got Pregnant Even When She Was Already Pregnant
Did you know that Twins can have two different Fathers?
Possible Sex Combinations for Identical and Fraternal Twins. Can Boy/Girl Twins Be Identical? Boy/girl twins are always fraternal or (dizygotic); they can only form from two separate eggs that are fertilized by two separate sperm.
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The probability is the same as with any two siblings. For every conception/ pregnancy, there is (about) a 50% chance of the offspring being a.
Description:They may be so similar that they are assumed to be identical, just as some siblings would be remarkably indistinguishable, if only they were the same age. This may occur if a woman is hyperovulating and has sexual relations with more than one partner. The self-contained halves then develop into two babies, with exactly the same genetic information. A female calf that is the twin of a bull becomes partially masculinized and is known as a freemartin. The twinning rate varies across populations Not every population has the same rates of twinning. The average cycle is around 28 days.
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