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No two sperm cells are identical because of the process of crossing over that occurs in prophase I of meiosis.
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Why are two sperm cells never identical?
No two sperm cells are identical because of the process of crossing over that occurs in prophase I of meiosis.
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.
Identical twins happen when the two eggs are fertilised?
No. They have to come from the same egg and sperm to have the same DNA (and be identical). Fraternal twins are non identical twins and come from two separate eggs.
What do you call identical twins that develop from two different eggs that are fertilized by different sperm?
That isn't possible: if the twins are from two different eggs, fertilized by different sperm, then they will not be identical. It's genetically impossible.
What is The scientific name for identical twins.?
Identical twins (monozygotic) occur when a single egg, fertilized by a single sperm, splits into two identical halves. Two separate babies with identical DNA are formed. Identical twins are always the same sex and blood type. http://www.twin-pregnancy-and-beyond.com/identical-twins-or-fraternal-twins.html
Why are some twins identical and some not?
The reason why some twins are identical and some are not starts in utero. Identical twins occur when one egg is fertilized and it splits to create two embryos. Nonidentical twins come from different fertilized eggs.
Is identical twins are more closely related than tyhe fraternal twins?
Yes. Identical twins started out as one egg and one sperm cell and are genetically identical. Fraternal twins come from two eggs and two sperm cells and are no more closely related than any other sibling.
However no two sperm are ever thought to be genetically identical. What factor explains this?
crossing over
Do identical twins develop from two different eggs that are fertilized by different sperm?
No, fraternal twins do.
Have there ever been two pieces of exactly identical popcorn?
No, there have never been two pieces of exactly identical popcorn.
Can two identical no be co-prime?
two identical numbers are never co-prime because each of them is a factor of the other.
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.
