text: About 10% of people all over the world are left-handed (Mcmanus, 2002). However, if you are wondering risks/odds, one area may be in familial sinistrality (how many family members you ahve that are left-handed).\n\nHandedness runs in families, and  even having a grandparent (who it can be argued will have be of little imitative effect) who is left-handed increases a person’s chance of being left-handed. The effects of parental sinistrality are seen below \n\n Effects of parental sinistrality (McManus, 2002)\n\nParents’ handedness (respectively)/ Percentage of left-handed children\n\nRight & Right   9.5%\nRight & Left    19.5%\nLeft & Left     26.1%\n\n\nIt is evident that children born to at least one left-handed parent are more likely than the rest of the population to be left handed.\n\nI hope that helps! all the best!