Grade 07 Science - EC: S7.B.1.2.1
Grade 07 Science - EC: S7.B.1.2.1
Continuum of Activities
The list below represents a continuum of activities: resources categorized by Standard/Eligible Content that teachers may use to move students toward proficiency. Using LEA curriculum and available materials and resources, teachers can customize the activity statements/questions for classroom use.
This continuum of activities offers:
- Instructional activities designed to be integrated into planned lessons
- Questions/activities that grow in complexity
- Opportunities for differentiation for each student’s level of performance
Grade Levels
7th Grade
Course, Subject
Science
Related Academic Standards / Eligible Content
Activities
- Define mitosis.
- Define meiosis.
- Summarize the process of cell division.
- How are mitosis and meiosis similar? How are they different?
- How is meiosis related to human reproduction?
- Through mitosis a parent cell divides to create two identical daughter cells. Predict what might happen if a defective cell goes through the process of mitosis. Use facts to explain your thinking.
Answer Key/Rubric
- Mitosis is the phase in cell division when the nucleus splits into two parts.
- Meiosis occurs only in reproductive cells. It is the process in which cells divide to form sperm cells in males and egg cells in females.
- Acceptable responses may include, but are not limited to:
- Interphase – cell grows and carries out normal life activities; cell prepares for division; copies its DNA
- Mitosis – when the cell’s nucleus divides; has 5 stages
- Prophase – nuclear membrane disappears; DNA condenses into chromosomes
- Metaphase – chromosomes line up in the middle of the cell
- Anaphase – chromatids of each chromosome split into two chromosomes; separated chromosomes move to opposite ends of the cell
- Telophase – new nuclear membranes form around each group of chromosomes
- Cytokinesis – cell’s cytoplasm is divided between the two new cells
- Acceptable responses may include, but are not limited to:
Similarities:
- Both start with one parent cell.
- Both result in new cells.
- Sequence of events (interphase, prophase, metaphase, anaphase, telophase, cytokinesis) is the same.
Differences:
- Sequence occurs once in mitosis.
- Sequence occurs twice in meiosis.
- Mitosis creates 2 daughter cells.
- Meiosis creates 4 daughter cells.
- Meiosis only occurs in reproductive cells.
- Mitosis creates 2 cells with identical DNA.
- Meiosis creates 4 cells that do not have identical DNA.
- Acceptable responses may include, but are not limited to:
- Meiosis occurs in reproductive cells.
- It is the process in which cells divide to form sperm cells in males and egg cells in females.
- The sperm cell holds half of the chromosomes necessary for humans. The egg cell holds the other half.
- When a sperm fertilizes an egg cell, a zygote is formed with all of the necessary human chromosomes.
- Acceptable responses may include, but are not limited to:
- Mitosis is the process when a cell’s nucleus divides.
- Two identical daughter cells are created from one parent cell.
- The two daughter cells’ DNA is identical to the parent cell.
- If the parent cell is defective, then the daughter cells will also be defective.
- All of the cells that are created with the defective DNA will pass down the same defects.
- This will harm the tissue/organs/organ system/organism.
