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Biology: 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 the cell of a diploid organism (2n=4) undergoes mitosis, how many chromosomes are present in each daughter cell?

Question 2 2. Mendel's study of what plant eventually revolutionized the understanding of heredity?

Question 3 3. Which of the following is true about dominant alleles?

Question 4 4.

Which of the following statement(s) accurately describes an advantage provided by model organisms?

I. The laboratory environment can be controlled.

II. True-breeding strains can be generated.

III. Specific combinations of alleles can be engineered.

Question 5 5.

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).

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Question 6 6. All of the following statements about the triangle symbol are true EXCEPT:

Question 7 7. Which of the following crosses most likely produced the following results, where B=blue, b=green, H=two-horned and h=one-horned: 54 blue, two-horned lizards, 18 blue, one-horned lizards, 18 green, two-horned lizards, and 6 green, one-horned lizards?

Question 8 8. Genes are made up of ______.

Question 9 9. If the cell of a diploid organism (2n = 6) undergoes meiosis, how many chromosomes are present in each daughter cell at the end of meiosis II?

Question 10 10. An individual with one dominant and one recessive allele is known as which one of the following?

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Question 11 11. Which of the following describes a difference between determining sex in a human and determining sex in a fruit fly?

Question 12 12. Which of the following statements about the proband is TRUE?

Question 13 13. In 1900 the observation of what helped other scientists realise the significance of Mendel's work?

Question 14 14. A fly has the following chromosomes: 1 X, 3 Y, and 3 sets of autosomes. Which of the following is the sex?

Question 15 15.

Evaluate each of the following sets of data separately. Which of them provide evidence that the trait is polygenic?

I. The genotype at loci A, B and C each produces a protein that influences the length of an organism by an average of 0.6, 0.4 and 0.3 cm, respectively.

II. Three different alleles of gene D affect the length of an organism by an average of 0.6, 0.4 and 0.3 cm, respectively.

III. Loci E, F and G each modulates an independent pathway, which plays a role in determining the length of an organism.

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Question 16 16. An allele is _____.

Question 17 17. 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:

Question 18 18. What type of chromosomes are the fly chromosomes 2, 3, and 4?

Question 19 19. A couple has three children: a 14-year-old daughter and two sons, ages 10 and 12. If the mother and daughter are both known to have a genetic disorder, what would the pedigree of this family look like?

Question 20 20. A Punnett square is useful when determining phenotypic output, for all of the following reasons EXCEPT:

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Question 21 21. Which of the following is NOT an example of a homozygous genotype?

Question 22 22. What is a quantitative trait?

Question 23 23. 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 24 24. Gregor Mendel proposed which of the following concepts?

Question 25 25. All of the following statements are correct EXCEPT:

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Question 26 26. If black coat color is dominant (and completely penetrant), and chocolate coat color is recessive, a heterozygote would have which one of the following?

Question 27 27. A scientist is studying an animal which can be found with either black or white fur. Which of following could be FALSE in this study?

Question 28 28. The organisms in the initial step in a series of genetic crosses are known as the _____.

Question 29 29. How would you define a dihybrid cross?

Question 30 30. A fly has one X chromosome, a Y chromosome, and two sets of autosomes. Which of the following best explains why this fly would be categorized as a male?

Biology: 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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