Meiosis Review.

Slides:

Advertisements

Similar presentations

Meiosis Review.

Advertisements

Meiosis Honors Biology Spring 2013.

MEIOSIS chapter 11 section 4

Meiosis Sex cell (gamete) division= egg and sperm

Cellular Reproduction

Meiosis Review.

Objectives 1) Name three parts of the cell cycle. 2) Name four major parts of mitosis. 3) Identify important parts of a dividing cell. 4) Discuss important.

Parent cell (2n) MITOSIS MEIOSIS Parent cell (2n)

Lesson 9.3: Meiosis: The Life Cycle of Sex Cells Goals: Identify male and female gametes Compare chromosome numbers between somatic cells and gametes.

Chromosomal basis of inheritance cell division – mitosis and meiosis.

Meiosis.  Meiosis is a special type of cell division that occurs only in reproductive organs. Meiosis makes reproductive cells called gametes (egg or.

03_37 Mitosis and cytokinesis Slide number: 1 Copyright © The McGraw-Hill Companies, Inc. Permission required for reproduction or display. Early interphase.

Meiosis and Sexual Reproduction

Reduction of Chromosomes. Mitosis Cell duplication (or reproduction) where one cell creates two genetically identical daughter cells Cellular reproduction,

Chapter 10 Sexual Reproduction & Genetics Part 1: Meiosis.

AP Biology Lecture #23 Meiosis.

©2000 Timothy G. Standish Meiosis Gamete Production Timothy G. Standish, Ph. D.

The Cell Cycle.

Meiosis “Reduction Division”. Reduce the number of chromosomes by half Produce haploid cells (1 set of chromosomes) 2N → N Produce gametes (egg or sperm)

Asexual Reproduction. Fission Budding Fragmentation & Regeneration.

MEIOSIS AND SEXUAL REPRODUCTION. Meiosis Process of nuclear division that reduces the number of chromosomes in a cell by half 2 STAGES Meiosis I: Homologous.

MitosisMeiosis Start Diploid End DiploidHaploid

Meiosis. Meiosis is a form of cell division where diploid body cells make haploid gametes. In humans, this means cells that have 46 chromosomes (2N) divide.

10.6 Meiosis I in an animal cell Slide number: 1 Copyright © The McGraw-Hill Companies, Inc. Permission required for reproduction or display. Homologous.

Meiosis What does this picture tell us about meiosis? How is the purpose of meiosis different from the purpose of mitosis?

The Science Behind: Sexual Reproduction.

Meiosis and Mitosis.

Reduction-Division Genetic Recombination

Warm Up #5 Thinking back to MITOSIS:

DNA replication creating a tetraploid (4n) cell

2 divisions of the nucleus

What stage is it?? The sister chromatids are moving apart.

Interphase Nucleus is visible DNA in loose strands of chromatin

Division in meiosis I and II

MEIOSIS Objective: Students know that meiosis is an early step of sexual reproduction (2a) Students know that gametes are produced during meiosis.

Mitosis- Anaphase: Chromatids separate into chromosomes along spindle fibers Interphase: Growth and replication of DNA, manufacturing of additional organelles.

Meiosis: A special type of cell division

Meiosis and Sexual Reproduction

Meiosis I results in 2 haploid daughter cells

Making Gametes (Egg & Sperm)

Life of a Cell The Cell Cycle.

Meiosis I: Reduction Division

Meiosis. Meiosis In diploid cells, there are two chromosomes of each type (2n), called homologous chromosomes Homologous chromosomes are not identical,

Stages of Meiosis Chapter 10.

Meiosis: The Process Biology 12.

Cell Reproduction Cell Cycle Mitosis Meiosis Misc

Chromosomes and Mieosis

Mitosis Meiosis Start Diploid End Haploid

MM Review Directions: For each scene or description that follows, identify the stage of Mitosis or Meiosis. Also indicate if the scene or description.

Cellular Reproduction

Meiosis Phases.

Sec 4.3 Meiosis.

Meiosis SC Standard B4.5- The student will be able to summarize the characteristics of the phases of Meiosis I and II.

Terms Homologous –describes the matching chromosome from each parent (one male / one female) Diploid – term used to describe a cell that contains both.

Presentation transcript:

Meiosis Review

Meiosis I: Replication

Interphase I DNA Replication Chromatin a “ball of yarn”

Prophase I Chromosomes coil and condense Form a tetrad (synapsis)

Metaphase I Tetrads align along equator

Anaphase I Tetrads split Form dyads Dyads move to opposite poles

Telophase I Cleavage furrow forms Cell splits (cytokinesis) Form two diploid daughter cells

Meiosis II: Reduction Division

Interkinesis Similar to Interphase I No DNA replication

Prophase II Chromosomes condense and coil

Metaphase II Chromosomes align along equator

Anaphase II Dyads split at centromere Chromatids move to opposite poles

Telophase II Cleavage furrow forms Cell splits Both diploid Forms 4 haploid daughter cells