HSCI 390 - Bio Statistics » Spring 2020 » Inheritance and Genetic Testing Quiz

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Question #1
Which of the following statements is NOT true? Select one:
A.   Two organisms with the same phenotype may h ave different genotypes
B.   A heterozygous organism may have the same phenotype as a homozygous organism
C.   A heterozygous organism may havehas the same number of alleles for a given trait as a homozygous organism
D.   Two organisms with the same genotypes are homozygous
E.   All of the above are true
Question #2
In a pea plants, the allele for purple flower color is dominant to the allele for white flower color. If you were to perform a test-cross to determine the genotype of a purple-flowered plant, you would expect the percentage of purple-flowered progeny to be ___ if the plant is homozygous and ___ if the plant is heterozygous. Select one:
A.   50%;25%
B.   50%;100%
C.   100%;25%
D.   75%;75%
E.   100%;50%
Question #3
Which of the following expresses Mendel's law of segragation?
A.   When gametes form, the genes originally from one parent all end uo in different gametes from the genes originally from the other parent
B.   Gametes with recessive alleles will fuse only with each other
C.   All dominant alleles of different genes divide into different cells from the recessive alleles.
D.   Two alleles of a gene separate during meiosis and end up in different gametes
E.   Genes do not influence each other with regard to sorting of alleles into gametes.
Question #4
A chestnut-colored (red-colored) horse is mated with a cremello (cream-colored) horse. Over a 10-year period, all of their offspring are palominos (gold-colored). This pattern of inheretance is best explained by
A.   epistasis
B.   multiple gene effects
C.   codominance
D.   complete dominance
E.   incomplete dominance
Question #5
If a female who carries the X-linked recessive gene for hemophilia mates with a male who does not have hemophilia, what is the chance that their daughter will be a carrier of the gene?
A.   100%
B.   0%
C.   75%
D.   50%
E.   25%
Question #6
Jay has type O blood, and his brother Alon has type AB blood. What are the genotypes of these boy's parents?
A.   Not enough information provided to answer the question
B.   lAi and lBi
C.   lAlA and lBi
D.   lAi and lBlB
E.   ii and ii
F.   ii and lBi
Question #7
A young woman had a baby and wished to collect child support from the father. Her blood type is A and the baby's blood type is O. There are two possible fathers: Jim (who is type o) and Michael (who is type B). Which man could be the father?
A.   either
B.   Jim
C.   Not enough information provided to answer the question
D.   Michael
E.   neither
Question #8
The genotype of a female carrier of the X-linked recessive gene for Duchene muscular dystrophy is represented by:
A.   XDXd
B.   XDY
C.   Normal muscle function
D.   XDXD
E.   XdY
F.   Has Duchene muscular dystrophy

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