0
Two ways-
Sometimes the mother releases two eggs instead of one. Each egg would be fertilized by a different sperm cell, and would grow into two different babies- known as fraternal or non-identical twins.
The second way is one egg, fertilized by one sperm- but as the egg begins to grow, it divides in two, each of which will become a baby- and they are identical to each other (they started life as the same being).
Wiki User
∙ 11y ago
Add your answer:
Earn +20 pts
What is the advantage of producing more sperm than eggs?
More baby.. Twins
Why can fraternal twins de different sexes while identical twins cannot?
To keep it simple and not get too technical, fraternal twins are from two eggs and two sperm that independently combine to produce a baby. Identical twins come from a single egg and sperm that divide to create two separate children. Gender is controlled by the males sperm and whether it contains the male genetic X chromosome. Since identical twins have the same sperm their genetic makeup is exactly the same (same egg and sperm used in development). Fraternal twins have two separate sperm and therefore it is possible one has the X chromosome and other does not.
How is a bady is made?
well a baby is made by your moms egg and your dads sperm. first they have to have sex so the sperm and egg can meet. then when the sperm touches the egg it starts to from into a baby. then the baby keeps growing until your mom couldn't hold you in her belly anymore.
How yo you make baby?
Let the sperm go through the ovum. This is how baby made.
What is the diffence between identical twins and fraternal twins?
Identical twins come from one egg and one sperm. Fraternal twins come from two eggs and two sperm.
Where are cells that make a baby produced?
The egg cell is made in the ovaries(women) and sperm in made in the testicles.
What did women do if they do not release sperm?
A women is not capable of releasing sperm. Women release eggs. Only a male (man) can release sperm from their body. When sperm and a fertilized egg combine, a baby is made.
Do identical twins develop from two different eggs that are fertilized by different sperm?
No, fraternal twins do.
Can fraternal twins have two sperm donors?
yes
Twins formed by the fertilization of two ova by two sperm are?
They would be fraternal twins. Identical twins are created when one sperm fertilized one egg, and hat egg then splits in two. Identical twins are always the same gender, while fraternal twins can be either gender, or a mix of the two.
My husband's grandmother was a twinWhat is the chance of me having twins?
The mans family history has nothing to do with twins or no twins....twins occur when a) the woman releases two mature eggs and they both get fertilized by two sperm or b) one mature egg is fertilized by one sperm and then that fertilized egg splits. One thing the man does contribute is the sex of the baby. A babies sex is solely determined by the father....not the mother.
What are the chances of twins in test tube babies?
yes...fraternal twins (different ova and different sperm). although it is also possible to generate identical twins I suppose (single ovum and single sperm). I have no idea what the statistics on this are however. Although if you're *really* asking "can I *force* a fertilized ovum to split into two and generate a set of identical twins?" then I would have to say "Not likely". Yes, an ovum can be forced to split. The above information is outdated.
