- they
develop from one zygote,
which splits and
forms two embryos, or
dizygotic ('non-identical' or 'fraternal'),
meaning that each twin
develops from...
- from one
zygote that
splits and
forms two embryos.
Fraternal twins are
dizygotic because they
develop from two
separate oocytes (egg cells) that are fertilized...
-
whereas dizygotic twins will
differ from one
another due to
genes in
addition to the environment.
Under this
simplistic model, if
dizygotic twins differ...
- left-handed
while 13% of
dizygotic twins were left-handed. In
another study, the
frequency of right-handed and left-handed
pairs of
dizygotic twins is
about 23%...
- from a
single zygote is
called monozygotic, from two
zygotes is
called dizygotic, or from
three or more
zygotes is
called polyzygotic. Similarly, the siblings...
-
experiences that one twin has but not the
other twin. "Fraternal" or
dizygotic (DZ)
twins share only
about 50% of
their genes, the same as any other...
-
digit is increased. In a 2006 study,
digit ratio analysis of opposite-****
dizygotic twins found that the
females in
these pairings were born with significantly...
-
levels of 5-methylcytosine DNA and
acetylation of
histones H3 and H4.
Dizygotic (fraternal) and
monozygotic (identical)
twins show
evidence of epigenetic...
-
twins have been
shown to be very
similar (though not identical),
whereas dizygotic twins have
considerably less similarity.
Significant heritability has...
- litter-bearing species, such as pigs. When it
comes to humans,
studies comparing dizygotic opposite-**** and same-****
twins suggest the
phenomenon may occur, though...
