catchallt3rm t1_isuc7os wrote

How can a receptor be associated with "more siblings"? Unless this
genetic variant was more commonplace among those from large
families/the middle class? Middle class women in England from over a
century ago were treated like broodmares - their downwardly mobile
children were continually replacing the lower classes. That's basically a
recipe for decreased genetic variability and more frequent 'variants'
like these.