| The GENETICA
DNA Test™ for Twin Zygosity
Twins can be identical or fraternal.
Identical twins have identical genes because they were conceived
from the same egg and sperm. Identical twins are always of
the same sex.
Fraternal twins have different genes. They were
conceived from different eggs and sperm. Fraternal twins may
be of the same sex, or, they may be of different sex. The
DNA twin zygosity test determines whether twins are identical
or fraternal.
The GENETICA DNA Test™ proves
with absolute certainty that twins are fraternal when the
DNA alleles of each twin are different. When the DNA alleles
of each twin are identical, the probability of identity is
calculated. The GENETICA DNA Test™ demonstrates
a greater than 99.9% probability of identity in such cases.
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