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It depends on the type of twins

If It was identical (monozygotic) twins, one egg is fertilized (As you can see, identical twins have similarity in phenotype (the observable characteristic of an organism) because of development of one zygote divided into two embryos)

but if it was non-identical twins, two eggs or more (such as triplets or quadruplets) are fertilized. The twins have differences in phenotype

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14y ago

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Related Questions

How many egg cells need to be pregnant?

Just one. If you have two egg cells, you may have twins.


What is it call when twins are fertilized into two separate cells?

Dizygotic twins. If they were fertilized in the same egg, they would be called monozygotic twins.


Identical twins happen when 2 egg cells are fertillised?

no. one egg is fertilized and it splits up later on.


Which event can result in the birth of identical twins?

Two egg cells are each fertilized by separate sperm cells.


Are non-identical twins occur when egg cells turns into embryos on their own?

No, non-identical twins are fraternal twins. They are created when two eggs are fertilized at the same time and become embryos. Identical twins are when a fertilized egg splits into two on its own.


What is the name for twins that aren't actually twins?

identical twins are single egg twins. fraternal twins a two egg twins. fraternal


Why are twins born same time?

Because two egg cells are in the uterus at the same time and maturing. Identical twins are one egg cell that separated, that's why some babies are born connected. Fraternal children are when two egg cells enter the uterus and mature at the same time. That's why they don't look identical.


If having twins how many chromosomes does each egg get?

2


How many egg cells do bullfrogs produce?

it produces about 6 egg cells


Sexual reproduction is used in what?

sperm cells and egg cells


What is used in cell reproduction?

sperm cells and egg cells


Differences between identical and fraternal?

identical twins are from the same egg cell that split, but ferternal twins are from 2 entirely different fertilized egg cells. Thus identical look the same and ferternal can look entirely different.