In References to the "Alpha-Globin Locus" or "Beta-Globin Locus",the Term

Multiple Choice

In references to the "alpha-globin locus" or "beta-globin locus",the term "locus" means

A) a duplicated,ancestral gene.
B) a chromosome region with a cluster of related globin protein genes.
C) an alpha-,or a beta-globin protein with a single amino acid change.
D) the location,in this case red blood cells,where a mutant phenotype is manifested.
E) a geographical region where a genetic disease like sickle cell anemia is common.