REPRODUCTION 2 Kinds of Reproduction Asexual One parent

Chromosomes and Cell Division Chromosomes – Structures in a cell’s nucleus that contain genes.

How do all forms of asexual reproduction end in an organism? Through the process

Cell Division/MITOSIS!! Interphas I e Painted Prophase My Metaphase Aunt’s Anaphase Telophase Toes Crimson!Cytokinesis

Cell Division — 6 phases Mitosis — 4 phases 1. Interphase—normal life Toward the

5. Telophase- Mitosis is Nuclear complete membrane appears Cytoplasm 6. Cytokinesis divides DAUGHTER CELLS

Sexual Reproduction – Production of new organism from 2 parents , a male and

Meiosis (Process that produces sex cells with ½ number of chromosomes of parent cell.

Advantages/Disadvantages of Asexual/Sexual Reproduction Asexual Reproduction Organism does not Advantage need a mate to

Species (Group of similar organisms that can mate with one another and produce fertile

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REPRODUCTION 2 Kinds of Reproduction Asexual -- One parent Sexual -- Two parents Specifically -- Sperm and Egg

Chromosomes and Cell Division Chromosomes – Structures in a cell’s nucleus that contain genes. Genes – Found on chromosome in cell. Gives living thing a ce trait and tells a cell how to grow/develop.

How do all forms of asexual reproduction end in an organism? Through the process of MITOSIS! ( Form of reproduction requiring only one parent. )

Cell Division/MITOSIS!! Interphas I e Painted Prophase My Metaphase Aunt’s Anaphase Telophase Toes Crimson!Cytokinesis Actual “Cell Division” only happens in phases 2 -5!

Cell Division — 6 phases Mitosis — 4 phases 1. Interphase—normal life Toward the end— functions Humans 46 Once chromosomes 2. -- duplicat 92 e -Sister chromatids duplicatedheld centromer together- Mitosis e Prophase Nuclear membrane breaks begins Centrioles begin to move Spindle forms down & between 3. Metaphase. Centromeres line up in the Centromeres split— MIDDLE 4. Anaphase-- move to opposite sides

5. Telophase- Mitosis is Nuclear complete membrane appears Cytoplasm 6. Cytokinesis divides DAUGHTER CELLS -End result==2 NEW Exactly like the parent Is this a problem? ? cell!! Why?

Sexual Reproduction – Production of new organism from 2 parents , a male and a female. Sex Cell – Cell that has half the number of chromosomes found an organism’s body cells. An egg or a sperm. 23 23 chromosome s chromosom es Gamete 46 chromosome s - New person not exactly like each par 2 complete cells join, new baby has twice the chromosomes as eac

Meiosis (Process that produces sex cells with ½ number of chromosomes of parent cell. ) Sperm or Egg Cells (Gametes) 46 24 46 chromosomes 23 23 46 23 Sperm or Egg Cell 23

Let’s watch meiosis in action!

Advantages/Disadvantages of Asexual/Sexual Reproduction Asexual Reproduction Organism does not Advantage need a mate to produce offspring. Disadvantage Offspring exactly like parents. Sexual Reproduction Advantage Gives species variation. Disadvantage 2 parents needed for reproduction.

Species (Group of similar organisms that can mate with one another and produce fertile offspring. )

Why mitosis and meiosis?