Bachiller

1. Which of the following happens when a cell divides?
C) Each daughter cell receives its own copy of the parent cell’s DNA.
2. The process by which a cell divides into two daughter cells is called
D) mitosis.
3. An advantage of sexual reproduction over asexual reproduction is that sexual reproduction
C) provides genetic diversity
4. Which of the following lists structures from smallest tolargest?
C) double helix, nucleosome, coil, supercoil, chromosome
5. When during the cell cycle are chromosomes visible?
C) only during cell division
6. During which phase in the cell cycle does mitosis happen?
C)M phase
7. Which pair includes a phase of the cell cycle and a cellular process that occurs during that phase?
B)G2 phase, preparation for mitosis
8. When during the cell cycle isa cell’s DNA replicated?
C)S phase
9. Which of the following is a phase of mitosis?
C)Prophase
10. The first phase of mitosis is called
A)prophase.
11. During which phase of mitosis do the chromosomes line up along the middle of the dividing cell?
C)Metaphase
12. Which of the following represents the phases of mitosis in their proper sequence?
A)prophase, metaphase, anaphase, telophase13. What is the role of the spindle fibers during mitosis?
A)They help separate the chromosomes.
14. A cell with a defective p53 gene is likely to
A)stop responding to growth regulators.
15. Cancer affects
C) multicellular organisms only.
16. Why are stem cells important?
D)They have the potential to develop into other cell types.
17. Which of the following is a possible future benefit ofstem cell research?
B)reversing damage from a heart attack
18. If a pea plant has a recessive allele for green peas, it will produce
C)green peas if it does not also have a dominant allele for yellow peas.

19. When Gregor Mendel crossed a tall plant with a short plant, the F1 plants inherited
A)one allele from each parent.
20. If a pea plant’s alleles for height are tt, what is true of itsparents?
C)Both parents contributed a recessive allele.
21. A tall plant (TT) is crossed with a short plant (tt). If the tall F1 pea plants are allowed to self-pollinate,
D)the offspring can be tall or short.
22. In the P generation, a tall plant was crossed with a short plant. Short plants reappeared in the F2 generation because
C)the alleles for both heights segregated when the F1 plantsmade gametes.
23. A heterozygous tall pea plant is crossed with a short plant. The probability that an F1 plant will be tall is
B)50%.
24. Organisms that have two identical alleles for a particular trait are said to be
B)homozygous.
25. Gregor Mendel’s principles of genetics apply to
D)all organisms.
26. Why did Thomas Hunt Morgan use fruit flies in his studies?
A)Fruit flies produce alarge number of offspring.
27. Roan cattle show codominance for the color of their hair. There are alleles for red hair and white hair. What would you expect a heterozygous roan bull to look like if the trait showed incomplete dominance instead?
C)It would be spotted.
28. If an organism’s diploid number is 12, its haploid number is
B)6.
29. Gametes have
D)one allele for each gene.
30. Gametesare produced by the process of
B)meiosis.
31. Chromosomes form tetrads during
A)prophase I of meiosis.
32. What reduces the number of chromosomes during meiosis?
B)Metaphase occurs.
33. Unlike mitosis, meiosis results in the formation of
B)haploid cells.
34. What is formed at the end of meiosis?
B)four genetically different cells
35. RNA contains the sugar
A)ribose.
36. Unlike DNA, RNAcontains
B)uracil.
37. Which of the following are found in both DNA and RNA?
C)phosphate groups, guanine, and cytosine
38. Which of the following is true?
C)DNA contains uracil.
39. Which type of RNA brings the information in the genetic code from the nucleus to other parts of the cell?
C)mRNA
40. Which molecules are involved in protein synthesis?
D)messenger RNA, ribosomal RNA, and...