Practice Test

 

Question 1:

What is the likelihood that a monogenic, autosomal dominant trait will appear in a child whose mother does not have the trait and whose father is heterozygous for the trait?

  A.25%

  B.50%

  C.75%

  D.100%

  E. 0%

Question 2:

What is the likelihood that a monogenic, autosomal recessive trait will appear in a child whose mother does not carry the allele and whose father is a heterozygous carrier?

  A.25%

  B.50%

  C.75%

   D.100%

  E. 0%

Question 3:

What is the likelihood that the son of a man who is not color-blind and a woman who carries an allele for red-green color blindness (an X-linked recessive disorder) will be color-blind?

  A.25%

  B.50%

  C.75%

   D.100%

  E. 0%

Question 4:

If a woman who carries an allele for red-green color blindness and a man who is red-green color-blind have a daughter, what is the likelihood that she will be color-blind?

  A.25%

  B.50%

  C.75%

   D.100%

  E. 0%

Question 5:

If both parents are obese (a complex trait), what is the likelihood that their child will be obese?

  A.100%

  B.50%

  C.Cannot be calculated