Day 52 edited, Sunday, July14, 2012
Dear Family and Friends,
Its 1:15 am on the east coast, but Cathy posts a careful watch over my work and found a confusing typo. The passage should read (correction in bold & underline):
Sperm whales have 42 chromosomes, 20 matched pairs plus the two sex chromosomes. The particular number of chromosomes is not unique to one species as for example other whales have 42 chromosomes, but the specific number is unique to a species as sperm whales always have 42. This number is tightly regulated and maintained.
Cathy has been a night owl since she was born. Helped me by sleeping in as a baby and now editing as an adult.
Good night again.
John Pierce Wise, Sr., Ph.D.