When fears of contagious diseases such as avian flu and ebola arise, public health officials encourage people to replace greetings involving close contact (handshakes, hugs) with an elbow bump. this change in greetings represents a shift in?

The diagram shows the results when two parents are crossed. the letters represent alleles for a trait that is controlled by three different genes. which best describes this inheritance pattern? multiple allele because a trait is controlled by three different genes polygenic because the offspring have alleles from both parents multiple allele because the offspring have alleles from both parents polygenic because a trait is controlled by three different genes