In this case the daughter still has only a 50% chance of being colour defective. Blue colour blindness is far less common, being present in just 5% of all colour blindness sufferers. The genes affected are equal in both sexes.
The cheapest days to fly are usually Tuesday, Wednesday and Saturday. While your information may be only anecdotal evidence, it probably confirms what FareCompare.com's careful study of airline supply and demand confirmed in a 2011 study of U.S. carriers.
Airfare Expert: The three cheapest days to fly Rick Seaney, Special for USA TODAY Published 7:00 a.m. ET Aug. 26, 2014 Airlines discount prices for the days when most of us don't want to fly.