Uncle Sinclair and the extra chromosome

Uncle Sinclair was my maternal grandma Jessie’s youngest sibling. I’ve chosen him as he fits this week’s prompt from #52 ancestors, ‘Youngest’, and also because he had Down’s Syndrome, so he provides an interesting comparison with Mary Ann Ross from last week. (Peter) Sinclair Sclater (1904-1960) In contrast to Mary Ann, I know quite a  |  more…