About the literary statistics, it specifically says “These figures may be pessimistic because reading was taught before writing at school”. So the figures may actually underestimate the literacy rate. I don’t have the time to found other sources.
I’m not saying the increase in literacy rates was all genetic in origin. The fact that literacy increased on a societal scale probably had to do with new inventions that made it easier to publish and distribute written material (I’m not sure of the whole history to be honest so that is somewhat of a guess). However these societal changes may have also led to genetic changes as well. Read the “10,000 year explosion” for more examples of how societal changes lead to gene frequency changes that led to more societal changes. Some animals have rudimentary reading capabilities. Being able to read may just be an offshoot of some other brain process (reading facial expression for example). So evolution is often good at co-opting brain processes for alternative uses. With a wider distribution of reading material it is possible that evolution selected gene frequencies that altered reading ability (speed of reading, logical analysis, etc.)
I don’t think the it matters if the dyslexia gene is the same in females versus males. The phenotypical effect of the gene on the host (male vs. female) would likely be different. The fact that men and women have different hormones could alter the expression of any single gene (for example). The phenotypical effect of any gene in an organism is going to depend on a multitude of factors (like environment, other genes).
About the literary statistics, it specifically says “These figures may be pessimistic because reading was taught before writing at school”. So the figures may actually underestimate the literacy rate. I don’t have the time to found other sources.
I’m not saying the increase in literacy rates was all genetic in origin. The fact that literacy increased on a societal scale probably had to do with new inventions that made it easier to publish and distribute written material (I’m not sure of the whole history to be honest so that is somewhat of a guess). However these societal changes may have also led to genetic changes as well. Read the “10,000 year explosion” for more examples of how societal changes lead to gene frequency changes that led to more societal changes. Some animals have rudimentary reading capabilities. Being able to read may just be an offshoot of some other brain process (reading facial expression for example). So evolution is often good at co-opting brain processes for alternative uses. With a wider distribution of reading material it is possible that evolution selected gene frequencies that altered reading ability (speed of reading, logical analysis, etc.)
I don’t think the it matters if the dyslexia gene is the same in females versus males. The phenotypical effect of the gene on the host (male vs. female) would likely be different. The fact that men and women have different hormones could alter the expression of any single gene (for example). The phenotypical effect of any gene in an organism is going to depend on a multitude of factors (like environment, other genes).
That’s all I can say for now.