The Cat is Out of the Bag

On the twenty-first day of August 1990, our third grandchild is born and George’s chromosomes show up in our mailbox — rather pictures of them do, carefully arranged in neat rows to form his karyotype. Thus two important secrets are revealed in a single day: The child turns out to be a girl — 46XX as far as anyone knows; George turns out to be a mosaic — 38XY/39XXY as the Serology Lab tells us for sure.