Girls will be Boys: Men are Modified Females

The biblical story has it wrong. In Genesis, woman is made from a man's rib. The upshot of this is that women would be modified males, but in reality it is the other way round. Genetics and the process of evolution does not care for human stories, and it turns out that men are modified females. 

The default program for human embryos is female, towards which they develop unless receiving alternate instructions. Sometimes this default development towards female continues until puberty. In a small town in the Dominican Republic 1 in 90 of the boys in the area are born as females. Then at puberty when testosterone kick in, their bodies realise that they have instructions to become males. They then transition into normally developed males. So sometimes Girls will be Boys.

“Everyone comes from a common genetic and developmental framework that is tweaked by sex hormones,” says Richard Bribiescas, Ph.D., director of the Yale Reproductive Ecology Laboratory. "We all start as a generic embryo. You have a set of male or female sex chromosomes, but the distinction doesn’t kick in until your hormones enter the picture, he explains. Without hormones like testosterone, you would stay on the path to womanhood. And your body already started developing by the time this decision was made—which means your lady parts were already starting to form.”

I for one am as proud of my female bits as my male bits.

Reference:
Three Signs You Started as a Girl

oOo