Mendelian Genetics & Mechanisms of Heredity 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!

Page 1

Question 1 1. Gregor Mendel proposed which of the following concepts?

Question 2 2. Hemophilia is a trait carried by the mother and passed to her sons. The allele for hemophilia, therefore,

Question 3 3.

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 4 4. True-breeding plants show what phenotype?

Question 5 5. Refer to the diagram below showing a pedigree of a sex-linked recessive trait. In generation II, female number 5 marries a man and has three children. One daughter and one son do not have the recessive trait; the other son does have the recessive trait. Based on these results, one can conclude what?

Page 2

Question 6 6. A _____ is a trait which is determined by two or more genes, but not any environmental factors.

Question 7 7. A _____ is a cross between two individuals that are heterozygous at two loci.

Question 8 8. Before Mendel's pea plant experiments, genetic inheritance was thought to result in a blending of traits from the two parents. Which exception to Mendel's rules is an example of blending?

Question 9 9. If a strand of a DNA molecule has the sequence GTCCAC, what would be the sequence of the complementary section of DNA?

Question 10 10. 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?

Page 3

Question 11 11. Different forms of a gene are called what?

Question 12 12. 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 13 13. Which of the following statements bout linked genes is true?

Question 14 14. A test cross

Question 15 15. Sarah has blonde hair even though both of her parents have brown hair. In old photos she has seen that both her parents' mothers had blonde hair before it went white. Given this information what can you suggest about the dominance of the different hair color genes?

Page 4

Question 16 16. Which of the following situations is a pattern of inheritance for a sex-linked allele?

Question 17 17.

Genes A and B are located on the same chromosome arm in the following orientation: centromere, gene A, gene B, telomere. Which of the following recombinant chromatids could be produced by a crossover event between B genes in a heterozygote in which the dominant alleles are linked on one homolog and the recessive ones are linked on the other homolog?

I. A B

II. a B

III. A b

IV. a b

Question 18 18. Given that having spherical seeds is dominant to having wrinkled seeds, what is the probability that a cross between a pea plant with spherical seeds (S) and a pea plant with wrinkled seeds (s) will produce F1 progeny with spherical seeds?

Question 19 19. Mendel's second law is also known as:

Question 20 20. How would you define a dihybrid cross?

Page 5

Question 21 21. In humans, _____ is determined by the presence or absence of the _____ chromosome.

Question 22 22.

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

Question 25 25. Skin cancer is a multifactorial trait. Which of the following is plausible?

Page 6

Question 26 26. Which type of dominance describes a situation in which heterozygotes demonstrate a phenotype which is intermediate between the homozygotes?

Question 27 27.

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

Question 29 29. The organisms in the initial step in a series of genetic crosses are known as the _____.

Question 30 30. In a(n) _ cross, genes for two different characters separate.

Mendelian Genetics & Mechanisms of Heredity 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!

Biology 101: Intro to Biology  /  Science Courses
Support