Discussion
Dizygotic twins are :
Answer: C
Dizygotic twins may be of the same or different sex.
Dizygotic (fraternal) twins develop from two separate eggs fertilised by two different sperm. Genetically they are no more alike than ordinary siblings, sharing about half their genes, so they can be two boys, two girls, or a boy and a girl.
Being genetically identical and coming from a single fertilised egg describe monozygotic (identical) twins. Dizygotic twins are true twins, born together from one pregnancy.
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