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It depends on the type of twins. For identical twins, it only takes one egg and one sperm, which split into two embryos.
Fraternal twins (or triplets+) are caused when two separate eggs are fertilized by two different sperm to produce two embryos.
It takes two sperm to make fraternal twins (boy and girl) to get into the egg but to make identical, it takes one sperm and the egg splits in two resulting in identical twins. This is why they are identical, because they are exactly from the same egg and have the same gender. If one sperm only gets in, there is chance of the egg splitting in two for identical twins but most likely a single baby . The reason only one sperm can get in is because after one has penetrated through the egg, the egg sends a wave that sends the sperm away. This is why having twins is more rare than having one baby.
Mono zygotic twins, frequently referred to as identical twins, occur when a single egg is fertilized by a single sperm, which then divides into two separate embryos.
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How many sperm do starfish produce?
All animals produce about the same amount of sperm.
Humans can produce over eight million unique gametes because of independent assortment of homologous chromosomes. Human males can produce many billions of sperm during a lifetime. However no two sperm?
crossing over
How many times a male can produce his sperm?
Males produce sperm from the age of puberty throughout adult life.
How many eggs and how many sperm are there in fraternal twins?
11 sperms and 21 eggs
What males produce?
Males produce many things. They produce sperm as well as testosterone. They differ from women because women produce estrogen. Everyone produces immune system functions in their intestines.
How many chromosomes in human sperm cell?
too many.
How many produced chromosomes does a human body cell have?
Humans have 46 chromosomes. This means they will produce sex-cells (sperm and ovum/egg) which have 23 chromosomes.
How many different combinations of sperms are possible in a human male?
There are only two possible combinations of sperm that a male can produce. A single sperm will either be X bearing or Y bearing. If an X sperm splits one egg, the result will be female. If a Y sperm splits the egg, the result will be male.
Humans can produce over eight million unique gametes because of independent assortment of homologous chromosomes Human males can produce many billions of sperm during a lifetime However no two sper?
crossing over
What are many plant stimuli caused by?
Human Sperm
Do humans produce millions of eggs?
Females only produce one or two eggs, males produce many sperm.
How many offspring do koalas produce?
Koalas produce a single offspring, just once a year. On rare occasions, they may produce twins.
