Twin studies reveal the absolute and relative importance of environmental and
genetic ... By comparing many hundreds of families of twins, researchers can
then understand ..... This tendency may run...
Find out whether the tendency to conceive twins is an inherited trait that runs in ...
cycle (hyperovulation) is a genetic trait that can be passed from mother to child.
However, non-identical twins can run in families. ... Some women may be
genetically more likely to produce more than one egg during a menstrual cycle ...
Aug 16, 2016 ... The likelihood of conceiving twins is a complex trait. ... To explain how DZ
twinning can run in families, researchers have looked for genetic ...
Apr 7, 2013 ... I often get emails inquiring, "My grandmother's uncle was a twin. ... Hyper
ovulation is the tendency to release multiple eggs during ovulation, ... Fraternal
twins "run in families" on the mother's side only, if she inherits the gene ...
Identical twins do not run in families and can happen for any couple with any ... to
luck, coincidence and chance rather than any familial genetic tendency.
There is no evidence suggesting that identical twins run in families. ... Even if
there is a genetic tendency to produce twins in the male line, a man's sperm
Aug 27, 2012 ... Are the genes for twinning very rare or do they just rarely produce twins? ...
However, because fraternal twins can be the result of a gene on the ...
For reason unknown, having fraternal twins run in families, both from the ... the
tendency to ovulate more than one egg at a time does tend to run in families, ...
produce multiple eggs -- a trait that is inheritable -- fraternal twins can "run in the
Apr 21, 2015 ... for example, in my family (on my father's side), there have been only boys for the
last 5 ... Is it some genetic predisposition, or did we just beat the odds? .....
Therefore parents genetically disposed to produce males tend to have more ... An
X-bound tendency to create more females, e.g. by aborting all males.