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Genetic Inheritance 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. The phenotypic ratio in a dyhybrid cross is _____~.

Question 2 2. Two mammals with the genotype CcEe are crossed. 'C' produces a thick coat of fur and is dominant to 'c,' which produces a thin fur coat. 'E' produces brown eyes and is dominant to 'e,' which produces red eyes. What fraction of offspring would you except to have both a thin fur coat and brown eyes?

Question 3 3. How many genotypes can result from a dihybrid cross?

Question 4 4. What would be a possible genotype of an offspring if the parent's genotypes were AABBCC and aabbcc?

Question 5 5. In pea plants, having smooth pods is dominant to having wrinkled ones. What would be an explanation for wrinkled pods showing up if both parents were smooth?

Page 2

Question 6 6. What would be the expected ratio of genotypes in a cross between two parents who were both heterozygous?

Question 7 7. For a gene, if allele 'B' is dominant to allele 'b', then which genotype would you expect to be present when a recessive trait is present?

Question 8 8. Homozygous recessive means

Question 9 9. Which is not an example of a recessive trait in humans?

Question 10 10. Which is an example of a phenotype?

Page 3

Question 11 11. Why do we think there must be many genes for eye color?

Question 12 12. Are phenotypes caused by genes or environment?

Question 13 13. Which statement is true?

Question 14 14. A dominant allele ______.

Question 15 15. Having two different alleles for a gene is called ______.

Page 4

Question 16 16. What did Gregor Mendel notice in his pea plant hybrids that crossed white-flowered plants and purple-flowered plants?

Question 17 17. What is a monohybrid cross?

Question 18 18. In a monohybrid cross, how are the possible genotypes related to the phenotypes of the offspring generation?

Question 19 19. If one parent has a gene-pair of 'AA' and the other parent has a gene-pair of 'aa', what will the gene-pairs of their children look like?

Question 20 20. You have the gene-pair Aa. This gene controls your eye color. You have brown eyes because brown is the dominant trait. Which of the following is true?

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Question 21 21. Which of the following is true of a recessive trait?

Question 22 22. In the Punnett Square below, the possible genotypes of the offspring are shown inside the box/ grid, what are these?

Question 23 23. The following image shows the possible outcomes of two brown-eyed parents having children in terms of eye color. Which of the statements describes the genotypes of the parents?

Question 24 24. Which of these statements is true about genes?

Question 25 25.

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.

Page 6

Question 26 26. Autosomes are:

Question 27 27. In humans, _____ is determined by the presence or absence of the _____ chromosome.

Question 28 28. Which of the following best defines a trait controlled by multiple genes?

Question 29 29. A segment of DNA that codes for a trait is called a _____.

Question 30 30. What is an allele?

Genetic Inheritance 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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