A new theory suggests that conditions like autism and depression could occur based on a type of tug of war between mom and dad’s genes. The theory rests on the idea that more of a mother’s genetic make-up in her child will yield a higher incidence of mental conditions like bipolar disorder and schizophrenia. Meanwhile, more of a father’s genetic make-up predisposes the child to the autism spectrum, reports The New York Times. To read more click here.