Students describe the cell cycle and the stages of mitosis, explain why mitosis produces genetically identical diploid cells for growth and repair, and compare it with meiosis, which produces genetically different haploid gametes. They calculate chromosome numbers in body cells and gametes, cell numbers after repeated divisions and the mitotic index from microscope counts, and explain how uncontrolled mitosis leads to cancer.
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Curriculum: Texas grade levels (TEKS). We show specific outcome codes only where they have been verified against the official curriculum document.
Completed: Mitosis and Meiosis: How Cells Divide
10th Grade students (typically ages 15–16) working on cells & classification. It is pitched at level 3 · challenge.
Yes. The PDF includes a full answer sheet with model answers and success criteria where there is more than one good answer. You can also view the answers online.
About 45 minutes for 15 questions. Short, regular sessions work best: two or three a week beats one long one.
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Try Mutations, Variation and Natural Selection.
Success TutoringWorksheets10th Grade · Science · Cells & ClassificationName
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Mitosis: one division, two identical diploid cells. Meiosis: two divisions, four different haploid gametes.
The cell cycle has two main parts. During interphase the cell grows, makes new organelles and copies its DNA. During mitosis the nucleus divides, then the cytoplasm splits (cytokinesis) to make two genetically identical daughter cells.
Mitosis has four stages: prophase, metaphase, anaphase and telophase.
Meiosis makes gametes (sex cells). It involves two divisions and produces four cells, each with half the number of chromosomes of a body cell. Body cells are diploid (two sets of chromosomes); gametes are haploid (one set).
During meiosis, chromosome pairs are shuffled and swap sections, so every gamete is genetically different. This is a source of variation.
The mitotic index is the percentage of cells in a sample that are dividing. A higher mitotic index means faster cell division.
Preview — the PDF contains the full resource and answer sheet.
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Worksheet · 8th Grade · Cells & Classification · Level 2 · Standard
Worksheet · 8th Grade · Cells & Classification · Level 2 · Standard
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