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  2. Handedness - Wikipedia

    en.wikipedia.org/wiki/Handedness

    Handedness displays a complex inheritance pattern. For example, if both parents of a child are left-handed, there is a 26% chance of that child being left-handed. [23] A large study of twins from 25,732 families by Medland et al. (2006) indicates that the heritability of handedness is roughly 24%. [24]

  3. Twins and handedness - Wikipedia

    en.wikipedia.org/wiki/Twins_and_handedness

    If the parents are both right-handed, in dizygotic and monozygotic twins there is a 21% chance of one being left-handed. If one parent is left-handed, in DZ and MZ twins there is a 57% chance of one being left-handed. If both parents are left-handed, it is almost certain one twin will be left-handed. [citation needed]

  4. Prenatal hormones and sexual orientation - Wikipedia

    en.wikipedia.org/wiki/Prenatal_hormones_and...

    Handedness research has provided implications; because more men than women present a preference for their left hand, the higher proportion of non-right handedness that has been discovered among lesbians when compared to heterosexual women demonstrates a possible link of prenatal masculinization and sexual orientation. [49]

  5. 24 Things You Didn't Know About Left-Handed People - AOL

    www.aol.com/21-things-didnt-know-left-110300045.html

    Older Women Have More Left-Handed Babies. According to one Canadian study, women in their 30s and 40s were far more likely to have left-handed children than younger women. A study of 2,228 college ...

  6. Bias against left-handed people - Wikipedia

    en.wikipedia.org/wiki/Bias_against_left-handed...

    A left-handed shooter must either purchase a left-handed or ambidextrous firearm (which are manufactured in smaller numbers and are generally more expensive and/or harder to obtain), shoot a right-handed gun left-handed (which presents certain difficulties, such as the controls being improperly located for the left hand or hot shell cases being ...

  7. Gene involved in cell shape offers clues on left-handedness

    www.aol.com/news/gene-involved-cell-shape-offers...

    Over the centuries, many cultures disparaged left-handedness and tried to force lefties to become right-handed. In English, the word "right" also means "correct" or "proper."

  8. Laterality - Wikipedia

    en.wikipedia.org/wiki/Laterality

    A study done by the Department of Neurology at Keele University, North Staffordshire Royal Infirmary suggests that forced dextrality may be part of the reason that the percentage of left-handed people decreases with the higher age groups, both because the effects of pressures toward right-handedness are cumulative over time (hence increasing ...

  9. Neuroanatomy of handedness - Wikipedia

    en.wikipedia.org/wiki/Neuroanatomy_of_handedness

    Handedness in and of itself tends to be a grey area. The requirements for someone to be right- as opposed to left-handed have been debated, and because individuals who identify as left-handed may also use their right hand for a large number of tasks, identifying two clearcut groups of subjects is a challenging task.