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Classical & Molecular Genetics Chapter Exam

Exam Instructions:

Choose your answers to the questions and click 'Next' to see the next set of questions. You can skip questions if you would like and come back to them later with the yellow "Go To First Skipped Question" button. When you have completed the practice exam, a green submit button will appear. Click it to see your results. Good luck!

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Question 1 1.

If you determined that the percentage of fruit flies that have a red body and round wings is actually 25% what does this tell you based on the following Punnett square?

B (black body), b (red body), F (flat wings), f (round wings)

Question 2 2. What is Mendel's Second Law?

Question 3 3. Which of the following would make sense to represent left and right hand nature (left is recessive and right is dominant) and eye color (brown is dominant and green is recessive) in a Punnet Square.

Question 4 4.

Hemophilia is an X-linked recessive trait. Consider a cross between a woman who is a carrier and a man who suffers from hemophilia. Which of the following statements is/are true?

I. All sons of these parents will be a hemophiliac.

II. A son who suffers from hemophilia received the hemophilia allele from his mother.

III. Half of the daughters of this cross are predicted to be hemophiliacs.

Question 5 5. A scientist is studying an animal and determines that a gene is located on autosome two. It controls antler production in the male animals. Note that females do not produce antlers. This is an example of a:

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Question 6 6.

Which of the following statements is/are true?

I. A human with an X chromosome and a Y chromosome is male.

II. A human with only one type of sex chromosome (an X chromosome) is female.

III. All children of a color blind woman and a man who is not color blind will carry a color blind allele.

Question 7 7. Genetic disorders that are caused by structural changes to a chromosome or excesses or deficiencies of entire genes located on chromosomes are called:

Question 8 8. A genetic disorder that affects a single gene is categorized as a:

Question 9 9. If diet plays a key role in the development of a disorder with a genetic component, then this is most likely a:

Question 10 10. Which of the following is NOT an example of a phenotype?

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Question 11 11. The locus is _____.

Question 12 12.

Which of the following statements is true?

I. The one thousandth base pair on chromosome one of an organism is an example of a locus.

II. Changing the DNA in a gene by one base pair could create a new allele.

III. Cells in a diploid organism possess two copies of each homolog (except gametes).

Question 13 13. Which phenotype(s) do the red blood cells from a person with AB blood type exhibit?

Question 14 14. Joe is in urgent need of a blood transfusion. His blood genotype is AA. Mike has an oo genotype, and Mary has a BB genotype. Who would be able to donate blood to Joe, and why?

Question 15 15. Incomplete dominance governs the pigment gene of a flower. A mating between heterozygotes yields the following phenotypic ratio: 15 red flowers, 32 pink flowers and 14 white flowers. Which statement describes the situation?

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Question 16 16. Which of these is true of biparental inheritance?

Question 17 17. When genetic information is passed on through uniparental inheritance, which parent does it usually come from?

Question 18 18. Where is genetic information passed on through extranuclear inheritance NOT located?

Question 19 19. Alleles A and B are linked on chromosome 1 (such that you have A-B and a-b). Alleles C and D are linked on chromosome 2 (you have C-D and c-d). If a crossover event does not occur between either set of genes, which gamete genotype could NOT be produced by an individual heterozygous at each locus?

Question 20 20. When two genes are located on the same chromosome, they are said to be _____.

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Question 21 21. Alleles A, B, C and D are linked on one chromosome, and alleles a, b, c and d are linked on the homolog. During meiosis, a crossover event occurs between genes A and B. Which of the following is an example of a chromatid that could be found in one of the resulting gametes?

Question 22 22. Why is anemia a symptom of sickle-cell disease?

Question 23 23. _____ is a neurodegenerative condition affecting children, causing paralysis and death by the age of 4 and 5.

Question 24 24.

A genetic disorder X can be inherited, predisposed to, or developed with initially healthy genes due to things like sunlight exposure, smoking, or viruses.

Identify X.

Question 25 25. Let's say P is an allele that codes for purple flowers and p is an allele that codes for white flowers. A plant has alleles Pp. According to the Law of Segregation, what alleles would each gamete have?

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Question 26 26. Based on Mendel's pea plants, if P is an allele that codes for purple flowers and p is an allele that codes for white flowers, what can you say about a plant that has the alleles Pp?

Question 27 27.

Use a Punnett Square to figure out what percentage of pea plants would have purple flowers in the following cross:

A purple flowered pea plant (PP) crossed with a white flowered pea plant (pp).

Question 28 28. Consider the following experiment: A scientist determines that the number of dorsal spines of her experimental fish is determined by a single locus. She mates a fish with 1 dorsal spine with a fish of the same species with 2 dorsal spines. The mating produces ten fish, which all have 1 dorsal spine. Which of the following statements does not fit with this result?

Question 29 29. The trait which is expressed in a heterozygous state is known as

Question 30 30. Which of the following is NOT an example of a homozygous genotype?

Classical & Molecular Genetics Chapter Exam Instructions

Choose your answers to the questions and click 'Next' to see the next set of questions. You can skip questions if you would like and come back to them later with the yellow "Go To First Skipped Question" button. When you have completed the practice exam, a green submit button will appear. Click it to see your results. Good luck!

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