Reproduction dna replication
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This document discusses cell reproduction and DNA replication. It begins by explaining the reasons cells divide, including growth, repair, and reproduction. It then describes asexual and sexual reproduction, noting their advantages and disadvantages. The document explains that DNA replication must occur before cell division to provide each new cell with a full set of chromosomes. It outlines the three main steps of DNA replication: unzipping, base pairing, and producing two new DNA molecules. Finally, it briefly discusses mitosis and has students assess their understanding through a self-assessment chart.
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Reproduction dna replication
- 2. Reproduction & DNA Replication How does DNA copy itself?
- 8. TRY THIS! Non-example sperm and egg Drawing Definition Requires only one parent Vocabulary Term Asexual Reproduction
- 30. DNA Replication: 1. DNA Unzips Left 5’ Strand of Original DNA Right 3’ Strand of Original DNA 3’End 5’End A T T C C G 3’End 5’End A T A G G C 5” End
- 32. DNA Base Pairing – Step 2 3’End 5’End 3’End 5’End A T A G G C A T T C C G T C A G G C A T G T A C
Editor's Notes
- This PowerPoint has many animated slide progressions. You may only want to print the following slides: 1-11, 14-15, 22-47
- Answers are animated so you can ask students the question before you reveal the answers Maintain workable surface area to volume - too big-can’t work!! Replace damaged cells
- Binary Fission - split in two (bacteria) Budding- (Yeast) Vegetative Propagation - (Plants) Regeneration -
- Rapid production of offspring (bacteria) Replacement of lost body parts Desirable characteristics are continually passed on
- Formation of a new individual through the union of parent cells The number of chromosomes are animated so you can ask students the answers before it comes up
- Meiosis is the production of sex cells (gametes). During meiosis, the number of chromosomes in the daughter cells are reduced from the number of chromosomes in the parent cell (this is extremely important).
- Since two cells with different DNA (gene traits) unite, the individual is different from any other organism, including the parents. Genetic material is passed from the parents in chromosome sets.
- Since two cells with different DNA (gene traits) unite, the individual is different from any other organism, including the parents. Genetic material is passed from the parents in chromosome sets.
- Since two cells with different DNA (gene traits) unite, the individual is different from any other organism, including the parents. Genetic material is passed from the parents in chromosome sets.
- Since two cells with different DNA (gene traits) unite, the individual is different from any other organism, including the parents. Genetic material is passed from the parents in chromosome sets.
- Since two cells with different DNA (gene traits) unite, the individual is different from any other organism, including the parents. Genetic material is passed from the parents in chromosome sets.
- Haploid – number of chromosomes in sex cells represented by n indicating one chromosome Diploid - number of chromosomes in somatic cells represented by 2n indicating a set or double number of chromosomes
- Haploid – number of chromosomes in sex cells represented by n indicating one chromosome Diploid - number of chromosomes in somatic cells represented by 2n indicating a set or double number of chromosomes
- If body cells do not have the correct 2n chromosome number, the cell will not be able to function properly
- Have students notice that the majority of a cell’s life is spent in interphase and during that time, the cell is performing all it’s cellular processes needed to survive. Indicate that M is Mitosis, the small amount of time the cell spends dividing. Picture taken from http://www.sol.duke.edu/mitosis/cycle/
- Have students notice that the majority of a cell’s life is spent in interphase and during that time, the cell is performing all it’s cellular processes needed to survive. Indicate that M is Mitosis, the small amount of time the cell spends dividing. Picture taken from http://www.sol.duke.edu/mitosis/cycle/
- Have students notice that the majority of a cell’s life is spent in interphase and during that time, the cell is performing all it’s cellular processes needed to survive. Indicate that M is Mitosis, the small amount of time the cell spends dividing. Picture taken from http://www.sol.duke.edu/mitosis/cycle/
- The DNA molecule will “unzip.” The enzyme helicase (the light blue circle) will break the weak hydrogen bonds between the nitrogen bases. The molecule can then be separated. In an actual cell, the entire molecule of DNA does not separate at once. It separates in pieces.
- Another enzyme named DNA polymerase will match new DNA nucleotides (one by one) to the corresponding nitrogen base in the existing DNA strand. Then, and enzyme called DNA ligase will attach the hydrogen bonds between the bases, acting as a “glue” to connect the two strands. Each DNA molecule contains a new strand as well as an existing strand from the original molecule.
- Step 1 – DNA unzips Step 2 – Complementary bases match with each DNA strand in the open helix Step 3 – DNA zips up
- Step 1 – DNA unzips Step 2 – Complementary bases match with each DNA strand in the open helix Step 3 – DNA zips up
- Step 1 – DNA unzips Step 2 – Complementary bases match with each DNA strand in the open helix Step 3 – DNA zips up
- Remind students Mitosis is an asexual cellular reproduction
- Remind students Mitosis is an asexual cellular reproduction
- This can be done individually, in small groups, or as a class activity. During the brainstorming phase, emphasize getting lots of ideas rather than debating or discussing the idea as they are generated. Debates, clarifications, and discussion of ideas occur once the brainstorming is over.