64 Polygenic inheritance
A)reflects the influence of a single gene.
B)determines "either-or" traits,such as eye color.
C)cannot be studied because its influence is too broad.
D)influences behavioral and psychological traits such as intelligence.
65 Most behavioral and psychological characteristics follow a(n)__________ pattern of genetic inheritance.
66 Personality is
A)determined by a single gene.
B)a polygenic trait.
C)determined by the sex chromosomes.
D)not influenced by genetic factors.
67 When phenotypes are caused by the combined effect of many separate genes,the pattern of inheritance is referred to as