Reproductive Health
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Junior Health
Daily Recording Calendar
 Current Event Article Due Friday
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Identical Twins Vs. Fraternal Twins
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Identical twins are the result of a single fertilized egg
splitting into two separate embryos.
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The two embryos can share a single placenta and can
be in the same or different sac.
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Since identical twins come from the same fertilized
egg, they have the exact same DNA.
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They are always of the same sex and they have the
same blood type. Testing the DNA of twins is one way
to determine if they are identical or fraternal
Identical Twins
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Two separate eggs (ova) are fertilized by two separate
sperm, resulting in fraternal or ‘dizygotic’ (two-cell)
twins.
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These babies will be no more alike than siblings born
at separate times.
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The babies can be either the same sex or different
sexes, with the odds roughly equal for each.
Fraternal Twins
Identical
Fraternal
Daily Recording Calendar- Catch up!
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TEST TOMORROW
Reproductive Health
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Nocturnal emission
Circumcision
Vulva
Menstruation
Fallopian tube
Ejaculation
Masturbation
Sterility
Impotency
Causes of an erection
2 functions of vagina