The Difference Between Anaphase of Mitosis and Anaphase I of Meiosis Is That
Name ______Per ______Date ______
MEIOSIS WORKSHEET
The following statements describe events in both meiosis I and meiosis II. Identify each phase, specifying whether it occurs during meiosis I or II; for example, Prophase I or Prophase II.
Statement / Name of Phase1. Homologous chromosomes line up at the equator
2. The cell replicates its chromosomes.
3. Centromeres break and sister chromatids pull apart.
4. The spindle forms, and the chromosomes coil, condense, and come
together in a tetrad; crossing over occurs.
5. Events occur in the reverse order from the events of prophase I. Each
new cell still contains double the amount of DNA.
6. Homologous chromosomes separate and move to opposite ends of the cell.
7. Nuclear envelope & nucleolus reform; cells contain ½ the amount of genetic
material as the original cell.
8. Sister chromatids line up on the metaphase plate.
9. Nuclear envelope disintegrates; spindle fibers elongate; DNA coils and
condenses; sister attach at their centromeres.
10. Describe the difference between anaphase of mitosis and anaphase I of meiosis. ______
11. Explain why is meiosis referred to as “reduction division”? ______
______
12. Which process would restore the diploid chromosome number after being halved in meiosis? ______
13. Diploid is to somatic as haploid is to ______.
14. The study of heredity is known as ______.
15. The passing of traits from parents to offspring is called ______.
16. If the liver cells of an animal have 24 chromosomes, the sperm cells would have how many chromosomes? ______
17. ______The exchange of segments of DNA between the members of a pair of chromosomes….
a. acts as a source of variation within a species
b. ensures that variations within a species never occur
c. occurs during metaphase I of meiosis
d. always produces genetic disorders
e. is called independent assortment
18. ______Which of the following events DOES NOT occur in both prophase I of meiosis and prophase of mitosis?
a. the chromosomes condense in both
b. the nuclear envelope disassembles in both
c. a spindle forms in both
d. tetrads form in both
e. each chromosome has two chromatids in both
Examine the table. Then answer the questions.
Chromosome Numbers of Some Common Organisms
Organism / Body Cell / GameteHuman / 46 / 23
Garden Pea / 14 / 7
Fruit Fly / 8 / 4
Tomato / 24 / 12
Dog / 78 / 39
Chimpanzee / 48 / 24
Leopard frog / 26 / 13
Corn / 20 / 10
19. What is the diploid number of chromosomes in corn? ______
20. What is the haploid number of chromosomes in tomatoes? ______
21. How many pairs of chromosomes do humans have? ______
22. What process maintains a constant number of chromosomes within a species? ______
23. Centromere is to sister chromatid as ______is to homologous pairs.
Label the diagrams below. Use these choices: Metaphase I, Metaphase II, Interphase, Telophase I, Telophase II, Anaphase I, Anaphase II, Prophase I, Prophase II.