7 - Unit 1, Section 4 - Day 1
Presentation
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Science
•
7th Grade
•
Easy
Standards-aligned
Pete Shumate
Used 4+ times
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6 Slides • 8 Questions
1
Unit 1, Section 1
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Fill in the Blanks
REVIEW TIME! A
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Fill in the Blanks
REVIEW TIME, PART 2! A
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Organisms reproduce, which means they make copies of themselves
That means cells themselves have to reproduce
How do you think that happens?
Think-Pair-Share
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Open Ended
Discuss the following question with your partner and answer it: How do you think a cell reproduces?
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Open Ended
What part of a cell do you think must be copied first?
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Chromosome - a tightly-packed molecule that contains all, or part, of an organism's DNA
Every organism has a certain number of chromosomes in their cells
Different chromosomes have a different percent of DNA
Chromosomes
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Most human cells have 23 pairs of chromosomes
That's 46 chromosomes in total!
Human Chromosomes
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Cell Division - the process of cell reproduction
One cell creates daughter cells that have the genetic information of the parent cell
There are two types of cell division:
Mitosis
Meiosis
Cell Division
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| Mitosis | Meiosis |
|---|---|---|
Purpose | Growth, Repair, Replacement of Dead Dells | Production of Gametes for Sexual Reproduction |
Chromosomes in Parent Cell | 23 Pairs (46 Total) | 23 Pairs (46 Total) |
Chromosomes in Daughter Cells | 23 Pairs (46 Total) - | 23 Total (Not in Pairs) - |
Number of Daughter Cells | Two | Four |
Daughter Cells: | Are Genetically Identical to Parent Cells | Are Not Genetically Identical to Parent Cells |
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Fill in the Blanks
A
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Most human cells have
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The purpose of
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The purpose of
Unit 1, Section 1
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