WHY SOME PEOPLE ARE LEFT HANDED?
Do you know Worlds 90% population is right handed and 10% is left handed. Ever thought what is the issue with this handedness? Why are some left handed and why some are right handed? Let us first discuss what handedness is, in human biology handedness refer to dominant hand i.e. which hand an individual prefers or is capable for performing tasks with more efficient way. Well, some say its evolution (because most the instruments including very basic one ‘scissor’ to the tool one can date back to centuries that primitive Homo sapiens used.), But some say this decided in genetics of a person(from the time when a baby is in womb of mother it decides which thumb it will love to suck). Some research studies of prenatal development lead to the belief that handedness is determined in womb. After birth, 39% of infants (6 to 14 months) 97% of toddlers (18 to 24 months) demonstrated hand preference. Let’s get into each of commonly considered causes: DIVISION OF LABOUR:...