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WHAT IS THE DIFFERENCE BETWEEN ASEXUAL AND SEXUAL REPRODUCTION? Asexual Reproduction: Used by itty bitty prokaryotes (no nucleus) to reproduce Used by eukaryotes (like us) to grow new cells and replace dead cells. Passes on all DNA Each “daughter” cell is a clone of the parent. ASEXUAL REPRODUCTION ASEXUAL REPRODUCTION ASEXUAL VS SEXUAL REPRODUCTION Sexual Reproduction: Mixes DNA Produces half the number of chromosomes (haploid) Cells involved are called gametes (ova and sperm) ASEXUAL VS SEXUAL REPRODUCTION ASEXUAL Mitosis SEXUAL Meiosis ASEXUAL VS SEXUAL REPRODUCTION What other information can you add to the Venn-Diagram? CELL DIVISION Prokaryotes use a simple form called binary fission. Eukaryotes use the Cell Cycle. Interphase Mitosis Cytokinesis WHAT IS THE CELL CYCLE? A sequence of growth and division in the life of a cell. What is the human growth cycle like? INTERPHASE During interphase the cell grows and DNA replicates (makes copies) Divided into three stages G1 (Growth/Gap 1) S (Synthesis) G2 (Growth/Gap 2) Most of the cell’s life is spent in interphase. ADD TO THE DIAGRAM IN YOUR NOTES WITH INFORMATION FROM THE NEXT SLIDE. G1 (growth;Gap 1) 11 hrs. • Rapid cell growth • Cell doubles in size • Enzymes + organelles double in number S= Synthesis • Growth esis n i k o t Cy sis o t i M • DNA makes a copy of itself G2=Gap 2 7 hrs. • Rapid Growth • Final preparation for cell division 3 hrs. MITOSIS Division of the cell’s nucleus Chromosomes are split into two identical sets Many steps, we will get there! CYTOKINESIS Cyto = cell Kinesis = moving Cytokinesis is when the cytoplasm divided and the two daughter cells are made. CYTOKINESIS REVIEW 3 – COPY & ANSWER THE FOLLOWING QUESTIONS ON THE LEFT SIDE OF YOUR IAN What is a trait of asexual reproduction? What is the term for when human cells divide asexually? What is a trait of sexual reproduction? What is the term for when human cells divide sexually?