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Responsible is a bit weird, as there's nothing really that can be done about it. But at a push I'd say the woman. Men always release plenty of semen, but women usually only release one egg. Non-identical twins happen when there are two eggs.
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Who is responsible for sex determination in humans the male or female?
When twins are the result of two eggs being fertilized at the same time (non identical twins) there is some evidence to show that there is a genetic basis for this kind of twins. However, it is only their mother that has any effect on the chances of having non identical twins; there is no known mechanism for a father to cause the release of more than one ovum When twins are the result of the zygote splitting into two embryos (identical twins) then this is considered a random act nobody is responsible.
What are MZ and DZ Twin Pairs?
MZ twins are identical twins that share 100% of the same DNA. DZ twins share only 50% of their DNA (fraternal twins). MZ twins are always the same gender, whereas DZ twins can be the same gender or one male and one female. DZM would be the male pairing of DZ twins, DZF is the female pairing, and DZO is when there is a male and a female.
What is a paternal twin?
There is no such thing as paternal or maternal twins. the only type of twins there are is FRAternal, and Identical. Identical twins are the result of one sperm fertilizing one egg and that fertilized embryo splitting apart and forming two fetuses, therefore the children are born identical, and thus must be of the same sex. Fraternal twins are the result of two eggs being fertilized at the same time by two different sperm, and the children will be born different from the other. As a result, they can be male/male, female/female, and female/male. also there is a very slim chance that fraternal twins can have two different fathers, as it can take up to two weeks after having sex for a sperm to fertilize an egg. so if a female has sex with multiple partners, there is a very small chance that the two twins could be from two fathers.
What are Cleopatras twins names and were they male or female?
Cleo's twins were named Cleopatra Selene and Alexander Helios. there was one of each --- a male and a female.
Are twins that can only be two girls or two boys identical?
No. In order for them to be identical they needed to start off as the same cell and divide so at first their DNA is identical meaning they have the same sex. During development slight changes may occur but the sex always stays the same. Boy-girl twins are always two different cells meaning that they are not identical. The term for boy-girl twins is furturnal. You can however have boy-boy twins and girl-girl twins that are not identical and they are also called furternal. So basically, identical twins start off as one cell that divides and furternal are two individual cells. There is polar body twinning, that's when the egg splits before fertilization, and that can cause a male and a female. This is called semi identical twins or half twins. They share 75% of their genetic markers.
How many different types of babies can you have?
boy, girl and simese twins Siamese twins are now properly called conjoined twins. You can have identical twins[ same sex] , fraternal twins [ one male , one female ]. triplets, same way, quadruplets, quintuplists , sextuplets and so on , with fertility drugs.
How do you say twins in Portuguese?
Twins in Portuguese is "gêmeos" for male twins or mixed-gender twins, and "gêmeas" for female twins.
Who is responsible of increasing crime male or female?
male
How are identical twins created or formed?
There are two way twins are formed. Twins can form by two eggs being released by the female and the sperm will fertilize both eggs. The other way twins can be formed is if one fertilized egg divides and forms two eggs.
Do twins have the same sexual orientation?
I know of two sets of twins, male, where one is straight and the other gay. One set is of identical twins, too. So, in my experience I would say, "not necessarily." On the identical set, the straight one was the first born. It has been my observation that the first born, at least of male identical twins, seems to be the more aggressive one of the two. No scientific basis for any of this - just my observations.
How do you distinguish a female from a male?
they are identical in appearance,but females grow larger.
Who is responsible for sex determination in humans the male or the female parent?
The Male.
