Meiosis Gizmo.pdf - Name Parker Heckman Date Student Exploration Meiosis Directions Follow the instructions to go through the simulation Respond to the

Meiosis Gizmo.pdf - Name Parker Heckman Date Student...

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Student Exploration: Meiosis Directions: Follow the instructions to go through the simulation. Respond to the questions and prompts in the orange boxes. Vocabulary: anaphase, chromosome, crossover, cytokinesis, diploid, DNA, dominant, gamete, genotype, germ cell, haploid, homologous chromosomes, interphase, meiosis, metaphase, mitosis, ovum, phenotype, prophase, recessive, sister chromatid, sperm cell, telophase, zygote Prior Knowledge Questions (Do these BEFORE using the Gizmo.) 1. During mitosis , a single cell divides to produce two daughter cells. What must happen in the original cell so that each of the daughter cells has a complete set of chromosomes ? 2. During sexual reproduction, two sex cells fuse to create a fertilized cell with a complete set of chromosomes. What must be true about the number of chromosomes in each sex cell? Gizmo Warm-up Meiosis is a type of cell division that results in four daughter cells with half as many chromosomes as the parent cell. These daughter cells mature into gametes , or sex cells. In the Meiosis Gizmo, you will learn the steps in meiosis and experiment to produce customized sex cells and offspring. On the STEPS tab, click Male . You are looking at a germ cell , or a cell that will undergo meiosis to become gametes. 1. Read the description of interphase at the bottom of the Gizmo. What happens to the cell at the beginning of interphase? 2. Click on the DNA in the nucleus of the cell. Describe what happens. 3. Why is it necessary for the cell to grow and duplicate its DNA before the start of meiosis? Name: Parker Heckman Date: It must duplicate the perfect amount It must give half During the G 1phase ,cells grow and synthesize mRNA and proteins required for DNA synthesis .Chromosomes are copied during the S phase and ,in the G 2phase ,the centinues to prepare for division by synthesizing proteins and further increasing in size . It grows Reproduction for educational use only. Public sharing or posting prohibited. © 2020 ExploreLearning™ All rights reserved
Introduction: Unlike mitosis, which produces two identical daughter cells from one parent cell, meiosis creates four unique daughter cells with half the amount of DNA as the parent cell. Question: How does meiosis create four daughter cells from one parent cell? 1. Observe: ( Prophase I) Click on the nucleus to break it down then click on the DNA to condense it into chromosomes. Drag the centrosomes to the top and bottom of the cell. 2. Observe: ( Metaphase I and Anaphase I) - Drag the groups of homologous chromosomes to the metaphase plate, then drag spindle fibers from each of the centrosomes to the chromosomes. Click the centrosome to pull the chromosomes apart. How do the chromosomes separate in anaphase I? So there can be enough dan and chromosomes for the cells and the duplicate Activity A: Steps in meiosis Get the Gizmo ready: ! Make sure the STEPS tab is selected.

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