jueves, 8 de enero de 2015

TWINS

TWINS


Twins can either be monozygotic (identical), meaning that they develop from one zygote that splits and form two embryos,or dizygotic (fraternal) meanming that they develop from two eggs,each fertilized by separatw sperm cells.


CHARACTERISTICS

-The twins are not identical twins
-The twins start in one egg
-Some twins can be together because reproduction in not even finished




 






















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