The Cell & Inheritance Mr. Schumaier C & H 3.3
1 What important piece of information did Walter Sutton add to scientists’ understanding of genetics?
Sutton predicted that chromosomes were key to understanding how offspring come to have traits similar to those of their pa...
2 How does the number of chromosomes in a grasshopper’s sex cells compare to the number in its body cells?
The sex cells have exactly half the number of chromosomes as the body cells. Body Cells – 24 Sex Cells - ?
3 What role do chromosomes play in inheritance?
Genes are carried from parents to their offspring on chromosomes.
 
4 What is MEIOSIS?
MEIOSIS is the process where the number of chromosomes is reduced by half.
 
5 What type of cells form by meiosis?
Sex Cells Sperm & Eggs
6 What events occur during meiosis?
<ul><li>MEIOSIS BEGINS– Chromosomes copied </li></ul><ul><li>MEIOSIS I – Chromosomes pair up and two cells form with ½ the...
3. MEIOSIS II – Double rods split and move to ends of the cell. 4. END OF MEIOSIS – Four sex cells have been produced with...
 
7 How is a Punnett square a model for what happens during meiosis?
XX It shows how the alleles separate to form all the possible sex cells. X Y X X XX XY XY
8 How many chromosomes does a human body cell contain?
46
9 On what structures in a cell are genes located?
Genes are located on chromosomes.
10 The body cells of hamsters have 44 chromosomes.  How many chromosomes would the sex cells of a hamster have?
22 chromosomes
The End
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The Cell & Inheritance

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The Cell & Inheritance

  1. 1. The Cell & Inheritance Mr. Schumaier C & H 3.3
  2. 2. 1 What important piece of information did Walter Sutton add to scientists’ understanding of genetics?
  3. 3. Sutton predicted that chromosomes were key to understanding how offspring come to have traits similar to those of their parents
  4. 4. 2 How does the number of chromosomes in a grasshopper’s sex cells compare to the number in its body cells?
  5. 5. The sex cells have exactly half the number of chromosomes as the body cells. Body Cells – 24 Sex Cells - ?
  6. 6. 3 What role do chromosomes play in inheritance?
  7. 7. Genes are carried from parents to their offspring on chromosomes.
  8. 9. 4 What is MEIOSIS?
  9. 10. MEIOSIS is the process where the number of chromosomes is reduced by half.
  10. 12. 5 What type of cells form by meiosis?
  11. 13. Sex Cells Sperm & Eggs
  12. 14. 6 What events occur during meiosis?
  13. 15. <ul><li>MEIOSIS BEGINS– Chromosomes copied </li></ul><ul><li>MEIOSIS I – Chromosomes pair up and two cells form with ½ the number of chromosomes. </li></ul>
  14. 16. 3. MEIOSIS II – Double rods split and move to ends of the cell. 4. END OF MEIOSIS – Four sex cells have been produced with ½ the number of chromosomes.
  15. 18. 7 How is a Punnett square a model for what happens during meiosis?
  16. 19. XX It shows how the alleles separate to form all the possible sex cells. X Y X X XX XY XY
  17. 20. 8 How many chromosomes does a human body cell contain?
  18. 21. 46
  19. 22. 9 On what structures in a cell are genes located?
  20. 23. Genes are located on chromosomes.
  21. 24. 10 The body cells of hamsters have 44 chromosomes. How many chromosomes would the sex cells of a hamster have?
  22. 25. 22 chromosomes
  23. 26. The End

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