4 minute sand timer 4 minutes End The cards in your baggie contain a Vocabulary word, a picture, and a definition. Take four minutes and match each vocabulary word with its picture and definition. We’ll check your answers in a few minutes… Cell Cycle Vocabulary Review

How many did you get right? Think-Pair-Share: Why is cell division necessary? Answer: We need to grow and repair old/damaged cells.

Fill out the stages of the cell cycle to the best of your memory. Let’s See What You Remember Word Bank: Cytokinesis G2 Interphase M phase Telophase Anaphase G1 Prophase S phase Metaphase

Let’s See What You Remember G1G1 G2G2 S Phase Mitosis Pro- Meta- Ana- Telo- Cytokinesis Interphase M Phase G 1, S phase, G 2, M

Cells have a life cycle, just like humans do. What events occur from birth until death? What happens to your body from birth until teenage years ? Normal Growth G 1, S phase, G 2, M

Cells have a life cycle, just like humans do. Normal Growth G 1, S phase, G 2, M DNA Replication

Cells have a life cycle, just like humans do. Normal Growth G 1, S phase, G 2, M DNA Replication Grows & Prepares to Divide

Cells have a life cycle, just like humans do. Normal Growth G 1, S phase, G 2, M DNA Replication Grows & Prepares to Divide Nucleus Divides

Cells have a life cycle, just like humans do. Normal Growth G 1, S phase, G 2, M DNA Replication Grows & Prepares to Divide Nucleus Divides Cytoplasm Divides

Turn your notes over!

Mitosis Hands Think of your fingers as the chromosomes (the DNA) inside a cell. Mitosis is about the division of the nucleus (the DNA) so that each new daughter cell has the same exact DNA information as the original cell. I Passed My Algebra Test Commended

Phase Identification Practice! For each picture, show me what phase each cell is in by showing me your Mitosis Hands to represent that phase!

Anaphase A-away Interphase

Prophase- chromosomes form

Metaphase- Middle

Telophase- two new nuclei form

Interphase- cannot see chromosomes

Prophase- chromosomes form

Metaphase- chromosomes line up in middle

Cytokinesis- cytoplasm seperates making two new cells

#2 on your handout Using what you just learned about “Mitosis Hands” and the pictures we practiced identifying, complete #2 on your handout, describing what occurs at each phase of Mitosis. Write-Pair-Share 3-5 with your group.

Nuclear envelope breaks down, chromosomes form. Centrosome creates spindle fibers that move chromosomes to the middle of the cell Spindle fibers move chromosomes to opposite poles of the cell. Nuclear envelope starts to reform around 2 new nucleus.

Write-Pair-Share 3-5 with your group. The nucleus divides during mitosis. The cytoplasm divides during mitosis. A tumor forms when cells divide uncontrollably. This can be cancer.

How many types of eukaryotic cells are there in your body? Two! Somatic Cells = Body Cells (like muscle cells, skin cells, heart cells) What’s the other kind? Gametes = Sex cells (sperm and egg)

So What’s the Difference?

If Mitosis makes somatic cells… what process makes gametes (sex cells)? Meiosis

Cell Division Card Sort Divide the cards into two groups: Mitosis and Meiosis Discuss why you are putting each card in to each group. Keep your card sort out! Do not put it up.

Cell Division Card Sort Mitosis Meiosis

#6 on your handout Using your notes and the card sort you just completed, fill in as much information as possible into the chart for #6.

#6 on your handout Identical to parentNon-identical to parent Somatic cells (body cells)Gametes (sex cells) AsexualSexual Skin cells, liver cells, muscle Sperm or Egg cells

#7-9 on your handout The exchange of genes between homologous chromosomes. This is why every sperm cell or egg cell is different. Creates variation. Two alleles for a particular gene segregate (or separate) from each other and end up in different gametes. Each pair of alleles segregates independently of other pairs of alleles during gamete formation independently of one another DNA is the genetic information. It carries the codes to make different proteins. The monomers of DNA are nucleotides. The polymer is a strand of DNA.

Chromosome Number Discuss with a partner the difference between Haploid and Diploid. Gametes: Sperm & Egg Cells Gametes: Sperm & Egg Cells Haploid: (n) Half the # of chromosomes Haploid: (n) Half the # of chromosomes Diploid: (2n) Chromosomes in pairs Diploid: (2n) Chromosomes in pairs Somatic Cells: All Other Cells Somatic Cells: All Other Cells Replicated by Meiosis Sexual Reproduction Replicated by Mitosis Asexual Reproduction Write in your definitions on your Number of Chromosomes Worksheet (#1 and #2)

Chromosome Number Discuss with a partner the difference between Haploid and Diploid. Gametes: Sperm & Egg Cells Gametes: Sperm & Egg Cells Haploid: (n) Half the # of chromosomes Haploid: (n) Half the # of chromosomes Diploid: (2n) Chromosomes in pairs Diploid: (2n) Chromosomes in pairs Sperm (n) Sperm (n) Egg (n) Egg (n) Embryo (2n) Embryo (2n) Somatic Cells: All Other Cells Somatic Cells: All Other Cells Sperm n = 23 Sperm n = 23 Egg n = 23 Egg n = 23 Embryo 2n = 46 Embryo 2n = 46 In humans: Replicated by Meiosis Sexual Reproduction Replicated by Mitosis Asexual Reproduction

Complete as many practice problems as you can, stopping to check with the teacher along the way to check for understanding.

Check Your Answers diploid haploid Gamete Somatic 20

Check Your Answers Because you get one chromosome from mom and one from dad for each set Sperm and egg Fertilization diploid egg sperm

Wrap Up! YOU need to tell ME what you can about: Mitosis

Wrap Up! YOU need to tell ME what you can about: Cell Cycle

Wrap Up! YOU need to tell ME what you can about: Meiosis

Wrap Up! YOU need to tell ME what you can about: Haploid vs Diploid

Wrap Up! Complete the exit ticket.