161. A display of the chromosomes of a somatic cell during metaphase of mitosis is the 
A. karyotype.
B. autosome.
C. homolog.
D. locus.
E. genome.

162.  The specific location of a gene on a chromosome is its  
A.  homolog.
B.  genotype.
C.  phenotype.
D.  allele.
E.  locus.

163.  Chromosome pairs are called  
A.  karyotypes.
B.  genomes.
C.  homologous pairs.
D.  loci.
E.  haploid.

164.  A gene that is responsible for producing trypsin in the pancreas would be a ____ gene.  
A.  dominant
B.  regulatory
C.  structural
D.  recessive
E.  functional

165.  A different form of an allele at a particular locus that can have no effect to major effects on the phenotype is a(n)  
A.  allelic variant.
B.  mutated allele.
C.  polymorphism.
D.  All of the choices are correct.

166.  When the dominant allele does not completely mask the effects of the recessive allele in the heterozygote, it is called  
A.  dominance.
B.  polygenic dominance.
C.  codominance.
D.  incomplete dominance.
E.  corecessive.

167.  What type of gene expression are the ABO blood types an example of?  
A.  complete dominance
B.  codominance
C.  incomplete dominance
D.  recessiveness
E.  polymorphism

168.  Which of the following is an example of incomplete dominance?  
A.  minor thalassemia
B.  major thalassemia
C.  beta thalassemia
D.  polymorphism
E.  ABO blood groups

169.  A person’s height, intelligence, eye color, and skin color are examples of  
A.  incomplete dominance.
B.  complete dominance.
C.  complete recessiveness.
D.  codominance.
E.  polygenic traits.

170.  Genes on the X chromosomes are  
A.  polygenic.
B.  X-linked.
C.  simple.
D.  holandric.
E.  Y-linked.