Biomed 100 Practice Quiz
Chapter 20, Spring 2008
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  1. In the respiratory system, each cell contains _?_ gene(s) that affect whether or not the person has cystic fibrosis.
    1. one (1)
    2. two (2)
      3.
    3. twenty-three (23)
    4. forty-six (46)

  2. A "carrier" of albinism or cystic fibrosis is
    1. homozygous dominant
    2. homozygous recessive
    3. heterozygous
      4.
    4. could be either A. or C.
    5. could be either B. or C.

  3. An X-linked recessive condition is
    1. more likely to be seen in males than in females
      2.
    2. more likely to be seen in females than in males
    3. equally likely to be seen in males and females
    4. impossible in live births (embryos with an X-linked recessive always die prior to birth)

  4. In cases of complete dominance, what genotypes produce the dominant phenotype?
    1. homozygous dominant (such as "AA" or "+/+")
    2. homozygous recessive (such as "aa" or "cf/cf")
    3. heterozygous (such as "Aa" or "+/cf")
    4. both A. and C.
      5.

  5. Which one of the following is possible?
    1. type A mother and type B father produce type O child
      2.
    2. type AB mother and type O father produce type O child
    3. type O mother and type A father produce type AB child
    4. both A. and B. are possible

  6. Which karyotype contains 22 pair of autosomes plus one pair of sex chromosomes that do not match each other?
    1. Normal male.
      2.
    2. Normal female.
    3. Male with chromosomal defect.
    4. Female with chromosomal defect.

  7. Which statement is not true of X chromosomes?
    1. Contains many genes that are important in both males and females.
    2. Is considered a "sex chromosome" even though at least one copy is present in both males and females.
    3. Is the smallest of all human chromosomes.
      4.
    4. Each body cell of a female contains two (2) X chromosomes.