Meiosis In Grasshopper Testis

uSING vOCABULARY

1. For each pair of terms, explain how the meanings of the terms differ.

a. autosome and sex chromosome b. synapsis and crossing-over c. haploid and diploid

2. Explain the relationship between the terms chromosome and homologous chromosomes.

3. Use the following terms in the same sentence: mitosis, meiosis, and cytokinesis.

4. Word Roots and Origins The word oogenesis is derived from the Greek oion, which means "egg," and geneia, which means "birth." Using this information, explain why the term oogenesis is a good name for the biological process it describes.

Understanding Key Concepts

5. Describe the structure of a chromosome.

6. Compare prokaryotic chromosomes with eukary-otic chromosomes.

7. State the number of chromosomes in normal human cells.

8. Identify the type of chromosome that determines the sex of an organism.

9. Distinguish between haploid cells and diploid cells.

10. Define the term binary fission. In what type of organism does this type of cell division occur?

11. Differentiate mitosis from cytokinesis.

12. Describe the events that occur in the G0, Gj, and G2 phases.

13. Summarize the phases of mitosis.

14. Describe the process of cytokinesis in plant cells.

15. List the three main checkpoints at which the cell cycle is controlled.

16. Identify the type of nuclear division that results in haploid cells.

17. Compare the phases of meiosis I with those of meiosis II.

18. Name the meiotic process that results in genetic recombination.

19. Summarize the major characteristics of spermato-genesis and oogenesis.

20. Identify the relationship between sexual reproduction and genetic variation.

21. Unit 4—Cell Reproduction

^¡«m^ Write a report summarizing how ttOLOCI « different cancer-fighting drugs kill cancer cells by interrupting the events of the cell cycle.

22. CONCEPT MAPPING Use the following □ □ □ terms to create a concept map that shows the connection between cellular division in prokaryotes and eukaryotes: binary fission, cell cycle, cytokinesis, eukaryote, mitosis, and prokaryote.

Critical Thinking

23. Predicting Results Can mitosis occur in the absence of cytokinesis? Support your answer. If your answer is yes, describe how the new cell would appear in the G1 phase.

24. Making Calculations If you consider the mass of DNA in a sperm (a haploid cell) to be 1, what would the relative value be for the DNA mass of a cell in the G2 phase of the cell cycle?

25. Applying Information Does a cell in metaphase II have the same mass of DNA as a diploid cell in the G1 phase? Assume that both cells are from the same animal. Explain your answer.

26. Analyzing Information The events of mitosis in plants and animals are very similar, with the exception of the absence of centrioles in plants. How has the absence of centrioles in plant cells influenced scientists' thinking about the function of centrioles in mitosis?

27. Interpreting Graphics The photograph below shows cell division in a grasshopper testis. The offspring cells are gametes. Do you think the photograph shows mitosis or meiosis? Explain your answer.

Meiosis Grasshopper Testis

Ms/ Standardized Test Preparation

DIRECTIONS: Choose the letter of the answer choice that best answers the question.

1. Which of the following statements about prokary-otic chromosomes is true?

A. Prokaryotes have at least two chromosomes.

B. Prokaryotic chromosomes consist of a circular DNA molecule.

C. Prokaryotic chromosomes include histone and nonhistone proteins.

D. Prokaryotic chromosomes are made of DNA wrapped tightly around histone proteins.

2. Crossing-over occurs during which process?

F. mitosis

G. meiosis I

H. meiosis II J. interphase

INTERPRETING GRAPHICS: The graph below shows the relative mass of DNA and chromosome number for a cell undergoing mitosis. Use the graph to answer the questions that follow.

Mitosis

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Responses

  • massimo
    Do you think the photograph shows mitosis or meiosis?
    7 years ago
  • TUULIA
    Does a cell in metaphase 2 have the same mass of dna?
    6 years ago
  • Craig Sperber
    How has the absence of centrioles cells influenced scientists thinking about the function of?
    6 years ago
  • arlene
    Why are grasshopper testis good for meiosis?
    6 years ago
  • LILY
    Can you observe grasshopper testis crossing over?
    6 years ago
  • Darcie Kennedy
    Why are grasshoppers testis used for meiosis?
    6 years ago
  • bonifacio
    Is a grasshopper mitosis or meiosis?
    6 years ago
  • Hayley
    Which of the following meiotic processes would you expect grasshopper testes to undergo?
    6 years ago
  • Nathan Barnes
    Do grasshoppers use mitosis or meiosis?
    6 years ago
  • menegilda
    Does a cel in metaphase II have the same mass dna as a diploid cell in G1phase?
    6 years ago
  • anthony
    Does a cell in metaphase 2 have the same mass of dna as a diploid cell in g1 pase of the cell cycle?
    6 years ago
  • layton mackay
    Can grasshoppers divide by binary fission?
    4 years ago
  • Makda Muhammed
    Is grasshopper testis a eukaryotic or prokaryotic cell?
    4 years ago
  • ZOFIA
    What is the number of chromosome of grasshopper testis?
    4 years ago
  • orazio
    Do you think the photograph of grasshopper testes shoes mitosis or meiosis?
    3 years ago
  • Angelina
    Why choice the grasshopper for meiotic cell division?
    2 years ago
  • jeffrey
    What is the discussion on meiosis in grasshopper testis?
    2 years ago
  • karin
    Can a grasshopper divide by binary fission?
    2 years ago
  • CALIMERO
    Why we do use meosis by grasshopper testis?
    2 years ago
  • Maria Dickson
    How meiosis occurs in a grasshopper?
    1 year ago
  • frida
    How to identify different meiosis stage in grasshopper?
    1 year ago
  • jill troiano
    Does butterfly undergo mitotic and meotic division?
    1 year ago
  • may
    Why use grasshopper testis to see the different stages of meiosis?
    1 year ago
  • kelsey
    What is the stage of Grashoper Mitosis testis?
    1 year ago
  • beatriz
    How many chromosomes are in a grasshopper testis?
    10 months ago
  • lionella
    Why acetoalcohol is used in grasshopper testes slide?
    9 months ago
  • august rauhala
    What is the process take place during meiosis in the testes of a grasshopper?
    9 months ago
  • regina
    What is the name of the process that taking place during meiosis in the testis of a grasshopper_?
    9 months ago
  • Brigitte
    What meiotic phase is the testis of a grasshoper?
    6 months ago
  • Joan
    What process in grasshoper testis?
    2 months ago

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