Identical twins are produced from the same sperm and egg. After the first mitotic division, the cells detach from each other and develop into distinct individuals. In contrast, fraternal twins are produced from separate sperm and separate egg cells. If two parents with brown eyes (a dominant trait) produce one twin boy with blue eyes, what are the probabilities of the following

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tutorconsortium201 tutorconsortium201 · Answer 1 · 2022-07-28T21:28:16+02:00

The probability of other twin to have blue eyes is 100% because they are genetically identical.

Are identical twins are formed from two different eggs and two different sperm?

One fertilized egg (ovum), which develops into two children with the same genetic makeup, produces identical or monozygotic twins.
Two eggs (ova) are fertilized by two sperm to create fraternal or dizygotic twins, which are two genetically distinct infants.

How is identical twins formed?

When a single egg (zygote) is fertilized, identical twins (monozygotic twins) are produced.
The egg then separates into two, producing genetically identical twins.
If your twins are identical, you will have two girls or two boys because identical twins are always of the same sex.

What is special about identical twins?

Identical twins have DNA that is 99.9% the same.
They also have almost nearly identical brain wave patterns.
But they do have different fingerprints and teeth marks! 22% of twins are left-handed as opposed to the 10% of singletons who turn out to be left-handed.

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