171.  If an albino (aa) mates with a person homozygous for normal pigment (AA),  
A.  half of the offspring are normal.
B.  half of the offspring are albinos.
C.  all offspring are normal.
D.  all offspring are albinos.
E.  None of these choices is correct.

172.  The process of meiosis will _____ as the gametes are produced.  
A.  cut the chromosome number by 1/3
B.  cut the chromosome number by 1/2
C.  double the chromosome number
D.  not change the chromosome number
E.  triple the chromosome number

173.  Which of the following chromosome anomalies can be found in either sex?  
A.  Turner’s Syndrome (XO)
B.  Klinefelter’s Syndrome (XXY)
C.  Down Syndrome (Trisomy 21)
D.  Barker’s Syndrome
E.  They all can be found in either sex.

174.  A mutation involving a single nucleotide is a _____ mutation.  
A.  deletion
B.  duplication
C.  nondisjunction
D.  point
E.  aneuploidy

175.  A mistake during segregation of chromosomes is called  
A.  deletion.
B.  duplication.
C.  nondisjunction.
D.  point mutation.
E.  aneuploidy

176.  Down Syndrome is an example of an aneuploidy called  
A.  monosomy 21.
B.  trisomy 21.
C.  monosomy 23.
D.  trisomy 17.
E.  disomy 21.

177.  What genetic disorder is the failure to produce clotting factors?  
A.  albinism
B.  sickle-cell disease
C.  hemophilia
D.  Down syndrome
E.  achondroplasia

178.  What genetic disorder is characterized by lack of skin, hair, eye coloration?  
A.  albinism
B.  sickle-cell disease
C.  hemophilia
D.  Down syndrome
E.  achondroplasia

179.  What genetic disorder is the inability to produce normal hemoglobin?  
A.  albinism
B.  sickle-cell disease
C.  hemophilia
D.  Down syndrome
E.  achondroplasia

180.  What genetic disorder is caused by having three chromosomes 21?  
A.  albinism
B.  sickle-cell disease
C.  hemophilia
D.  Down syndrome
E.  achondroplasia