Looking at this pedigree, how can you tell that blue skin is a recessive trait?

Most lived to their 80s and 90s without serious illness associated with the skin discoloration. ... "Blood cells always looked so beautiful to me," he says. ... If the blue people did have methemoglobinemia,

Explanation:

relative humidity, temperature and dew point -- are bound together in the mathematical relationship below. relative humidity changes when temperatures change. because warm air can hold more water vapor than cool air, relative humidity falls when the temperature rises if no moisture is added to the air. so i would say a