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Mendelian Concepts for the MCAT: Tutoring Solution 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. Which of the following statements about multifactorial traits is TRUE?

Question 2 2. Which of the following is NOT an example of a phenotype?

Question 3 3. Which phenotype(s) do the red blood cells from a person with AB blood type exhibit?

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. In the following pedigree, how many male cousins does the proband have?

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

Question 9 9. 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 10 10. Which of the following genetic techniques are used in human genetics?

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Question 11 11. Two animals heterozygous at gene A are mated. What ratio of genotypes will be produced in the offspring?

Question 12 12.

Which of the following statements is true?

I. A dihybrid cross is a cross between individuals heterozygous at one gene.

II. The law of independent assortment describes the relationship between alleles of a single gene.

III. The law of segregation describes the manner in which genes on different chromosomes segregate.

IV. Homologous chromosomes segregate into different gametes.

Question 13 13. Which of the following is NOT an example of a homozygous genotype?

Question 14 14.

If gene A is located on chromosome 1 and gene B is located on chromosome 2, which of the following genotypic frequencies could be produced among the progeny of the following cross: AABb x aaBb

I. 25% AaBB, 50% AaBb and 25% Aabb

II. 75% AaBB

III. 25% bb

Question 15 15. What is a proband in human genetics?

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Question 16 16. 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 17 17. Which type of dominance describes a situation in which heterozygotes demonstrate a phenotype which is intermediate between the homozygotes?

Question 18 18. Which of these terms accurately describes Alzheimer's disease?

Question 19 19.

You could draw which of the following conclusions from a dihybrid cross which produces a 9:3:3:1 ratio of phenotypes?

I. The alleles of one gene sort independently of another gene.

II. The alleles of the two genes in question exhibit a simple dominant/recessive relationship.

III. The animals which were crossed were both homozygous with respect to at least one locus in question.

Question 20 20. The following results were observed from a mating between two black and white speckled cats: 5 black cats, 12 black and white speckled cats, and 4 white cats. Which term describes the relationship between the alleles of the coat color gene?

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Question 21 21. If this is a pedigree for a family with a history of hemophilia, which is a sex-linked condition, what do we know about the proband's mother?

Question 22 22. 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 23 23. 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?

Question 24 24. What is the most likely type of inheritance for the genetic condition shown in this pedigree?

Question 25 25. What is the most likely type of inheritance for the genetic condition shown in this pedigree?

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Question 26 26.

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 27 27. When collecting samples to study the genetics of a complex disease, which of the following factors would you NOT want to be equally represented in both the affected and unaffected groups?

Question 28 28. A geneticist is studying a genetic condition. They determine that the causative gene for this particular condition is located on human chromosome 2. What can we conclude about the condition? Why?

Question 29 29. A criss-cross inheritance pattern is seen in what type of genetic inheritance?

Question 30 30. 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:

Mendelian Concepts for the MCAT: Tutoring Solution 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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