1. Genetics Practice Questions

2. Standard 2d: Mendel concluded that the alleles for tall stems in pea plants are dominant. Thus, crossing a purebred tall pea plant with a purebred short pea plant should result in A all tall plants. B all short plants. C all medium height plants. D half short and half tall plants.

3. Standard 2d: Mendel concluded that the alleles for tall stems in pea plants are dominant. Thus, crossing a purebred tall pea plant with a purebred short pea plant should result in Answer: A all tall plants.

4. Standard 2d: In the Punnett Square below, what percentage of the offspring will have purple flowers? A 25% B 50% C 75% D 100%

5. Standard 2d: In the Punnett Square above, what percentage of the offspring will have purple flowers? Answer: A 25%

6. Standard 2d: In the Punnett Square below, what percentage of the offspring are capable of passing on either the trait for white flowers or the trait for purple flowers to their offspring? A 25% B 50% C 75% D 100%

7. Standard 2d: In the Punnett Square below, what percentage of the offspring are capable of passing on either the trait for white flowers or the trait for purple flowers to their offspring? Answer: B 50% because Ww can pass on a W (white flower gene) or a w (purple flower gene)

8. Standard 2c: Some people have hair on the middle segment of each finger and some people do not. This characteristic is under genetic control. Which of the following statements is true? A The hair results from a mutation. B Each person has two or more alleles for this trait. C The genes that cause this trait are codominant. D The genes that cause this trait are unknown.

9. Standard 2c: Some people have hair on the middle segment of each finger and some people do not. This characteristic is under genetic control. Which of the following statements is true? Answer: B Each person has two or more alleles for this trait.

10. Standard 2e: The diagram shows A DNA. B RNA. C proteins. D ribosomes.

11. Standard 2e: The diagram shows Answer: A DNA.

12. Standard 2d: Scientists call an organism that has two different alleles for a trait (Tt) A a hybrid. B homozygous. C purebred. D a factor.

13. Standard 2d: Scientists call an organism that has two different alleles for a trait (Tt) Answer: A a hybrid.

14. Standard 2e: What is DNA? A an energy-rich organic compound made of carbon, hydrogen, and oxygen B a drug that slows down the activity of the central nervous system C the genetic material that is passed from parent to offspring D the region of a cell located inside the cell membrane in prokaryotes

15. Standard 2e: What is DNA? Answer: C the genetic material that is passed from parent to offspring

16. Standard 2e: Which of the following is made up of strands of DNA? A allele B chromosome C gene D nucleus

17. Standard 2e: Which of the following is made up of strands of DNA? Answer: B chromosome

18. Standard 2e: Which of the following are found in the nucleus of a cell? A chloroplasts B chromosomes C Golgi apparatus D mitochondria

19. Standard 2e: Which of the following are found in the nucleus of a cell? Answer: B chromosomes

20. Standard 2b: At the end of mitosis, chromosomes provide each daughter cell with A half the parent’s genetic material. B an exact copy of the parent’s genetic material. C twice the amount of the parent’s genetic material. D four times the amount of the parent’s genetic material.

21. Standard 2b: At the end of mitosis, chromosomes provide each daughter cell with Answer: B an exact copy of the parent’s genetic material.

22. Standard 2e: As a result of mitosis in a human body cell, each of the two nuclei formed has which of the following? A 12 chromosomes B 92 chromosomes C 23 chromosomes D 46 chromosomes

23. Standard 2e: As a result of mitosis in a human body cell, each of the two nuclei formed has which of the following? Answer: D 46 chromosomes

24. Standard 2e: Down Syndrome is a genetic condition caused by an extra #21 chromosome, giving a person an abnormal total of 47 chromosomes.

25. Standard 2d: Given: Widow’s peak is dominant (W) No widow’s peak is recessive (w) What would be the phenotype of a child that has Ww? A widow’s peak B no widow’s peak C male D female

26. Standard 2d: Given: Widow’s peak is dominant (W) No widow’s peak is recessive (w) What would be the phenotype of a child that has Ww? Answer: A widow’s peak