Under what circumstances can twins be born?????
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A twin is one of two offspring produced in the same pregnancy.Twins can either bemonozygotic ("identical"), meaning that they develop from onezygotethat splits and forms twoembryos, ordizygotic("fraternal"), meaning that they develop from two eggs, each fertilized by separate sperm cells.
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Dhroxx:
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Fraternal (Non-identical) twins are formed when two egg cells are fertilized; each egg by a different sperm so that two embryos are formed.
Identical twins are formed when one egg after being fertilized by one sperm, divides into two halves. The two halves are genetically identical.
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Identical twins are formed when one egg after being fertilized by one sperm, divides into two halves. The two halves are genetically identical.
Read more on Brainly.in - https://brainly.in/question/1521082#readmore
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