Biology Practice Exam 3 Mrs. Vehrs Cell Division Definitions: Write the word for the process or definition below. 1. This process produces reproductive cells (eggs and sperm). 2. This is the process of duplicating the nucleus in preparation of cell division. 3. This word means “cell division”. 4. This is the process of cutting the chromosome number in half. Draw a sketch representing each of the phases of mitosis listed below. (Note: they aren’t in order!) 5. metaphase 6. anaphase 7. interphase 8. prophase 9. telophase 10. The purpose of mitosis is to ____________________________________________________ 11. In a monohybrid cross, there are as many as __________ possible gametes for each parent. 12. In order to determine whether a pea plant showing the dominant round pea appearance was heterozygous or homozygous, you could ______________________________________________ 13. If Mendel had studied traits located on the same chromosomes, he would not have been able to _______________________________________________________________________ a. get parents pure (homozygous) for a trait. b. study two traits at the same time. c. develop his law of independent assortment. d. determine which traits were dominant. Analyze-Monohybrid crosses. In each of the following crosses, choose the word or phrase which best answers each question. Mark the letter of your choice on your answer sheet. You may work out the problem using a Punnett Square. A homozygous black dog is crossed with a homozygous white dog. Black is dominant. 14. The genotype of all the offspring is _____________ A heterozygous tall pea plant is crossed with a homozygous short plant. 15. The phenotype ratio is ________________ 16. The genotype ratio is ________________ In certain plants, violet flowers are dominant to white. A violet flowered plant is crossed with a white flowered plant. The offspring all produce white flowers. 17. The genotype of the violet flowered plant was _________ The violet flowered plant in the above problem is crossed to another violet flowered plant. The offspring again produce white flowers. 18. The genotype of the second violet flowered plant was ________________ 19. The purpose of meiosis is to ______________ DNA/RNA. Name the following processes. 20. DNA copies itself 21. DNA codes for RNA 22. RNA codes for amino acids 23. Give 3 differences between DNA and RNA. 24. Explain why you have DNA and where it is found. 25. Name the 3 types of RNA and tell what they do. 26. If one side of a DNA sequence is GTC CTA GGC TCC AGT, what is the sequence of the complementary side? 27. What is the mRNA sequence for the same DNA sequence? 28. What is the amino acid sequence coded by it? Sketch the following phases of meiosis. (Note: they aren’t in order!) 29. metaphase I 30. anaphase I 31. metaphase II 32. prophase II 33. telophase I