Which data suggest the strongest link between heredity and intelligence? a. Fraternal twins whose IQ scores correlate at the +.9 level b. Biological siblings whose IQ scores correlate at the +.9 level c. Identical twins whose IQ scores correlate at the +.9 level d. Adoptive siblings whose IQ scores correlate at the +.9 level

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.