How is pandemic flu different from seasonal flu? it is caused by bacteria. it can cause widespread death. it may seriously impact healthy adults. it has a vaccine available for prevention.

Color blindedness is a sex-linked trait. if we could see the pedigree chart for several more generations of the family illustrated here, we would expect a) more males to be color blind. eliminate b) more females to be color blind. c) no females to ever be color blind. d) an equal number of males and females that are color blind.