Inheritance Practice Test

Question #1 Which of the following does NOT describe a genotype? Pair of alleles HH Brown hair Homozygous

Question #2 A father can pass an X-linked allele to ___. Write in ALL that apply. All of his daughters Half of his daughters All of his sons Half of his sons None of his daughters None of his sons

Question #3 A man and woman, both with type B blood, have a child with type O blood. What is the probability that their next child will have type O blood? 0% 25% 50% 75% 100%

Question #4 Blood type is an example of which mode of inheritance? Write in ALL that apply. Incomplete dominance Codominance X-linked trait Multiple alleles Polygenic trait

Question #5 In a monohybrid, 25% of the offspring expressed the recessive trait. The genotypes of the parents must be Both homozygous Both heterozygous One homozygous and one heterozygous Not enough information is given

Question #6 Brown eyes are dominant over blue eyes. What is the probability that 2 blue eyed people can produce a brown eyed child? 0% 25% 50% 75% 100%

Question #7 Disease A is a dominant X-linked trait. Bob’s mother had the disease, but his father did not. Jane’s mother did not have the disease, but her father did. What are the possible genotypes for Bob and Jane? Bob: XAY, XY; Jane: XX, XAX Bob: XAY; Jane: XAXA Bob: XY; Jane: XX Bob: XY, XAY; Jane: XAX None of the above

Question #8 Which mode of inheritance has the widest variety of phenotypes? Complete dominance Incomplete dominance Codominance X-linked traits Polygenic traits

Question #9 The following pedigree shows an autosomal dominant trait. What are the possible genotypes of father in the top row? Use A.

Question #10 A parent makes the following gametes: bE, BE, bE, BE. What is that parent’s genotype?

Question #11 Curly hair is dominant to straight hair. Why is it that most people in a population have straight hair?