The Cell Cycle The cell cycle. Image from Purves et al., Life: The Science of Biology, 4th Edition, by Sinauer Associates (www.sinauer.com) and WH Freeman.

Slides:

Advertisements

Similar presentations

AQA Biology AS Level Unit 2

Advertisements

Sexual Division of Cells

At the end of mitosis, each daughter cell has

Chromosome Number - Is how many chromosomes a cell has

Aim: Why is meiosis important?

Meiosis Section10.2. In the body cells of animals and most plants, chromosomes occur in pairs. Diploid and haploid cells A cell with two of each kind.

Chapter 11-4 Meiosis.

Chapter 10.1, Meiosis.

Meiosis. What is Meiosis? Quick Review: What organelle is responsible for holding the cell’s genetic code? Meiosis is the process of creating 4 haploid.

How does meiosis lead to variation?

Interphase Telophase I Anaphase I Metaphase I Prophase I Cytokinesi s Images from:

Meiosis. II. What is meiosis? Meiosis is a process in which the number of chromosomes per cell is cut in half through the separation of homologous chromosomes.

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

Cell Reproduction

Keystone Review - Genes Alleles and Meiosis 1.C – the original number of chromosomes (60)is halved by the end of meiosis I (30) and remains constant through.

Cell Division SC.912.L Compare and contrast mitosis and meiosis and relate to the processes of sexual and asexual reproduction and their consequences.

The Cell Cycle & Cell Division

Cell Division Vocabulary

The Cell Cycle & Cell Division. NOTES: 1. Write the purpose for each type of cell division. (mitosis & meiosis) 2. Draw, label and describe each phase.

Genetic Variation Meiosis reduces the number of chromosomes and produces haploid cells from diploid cells.

Meiosis 10/29/09. What can you tell me about Mitosis?

How Cells Divide.

Sexual Reproduction and Genetics Section 1- Meiosis

10.1 Meiosis Learning Targets: Describe chromosomes in the phases of meiosis. Outline chiasmata in crossing over. Explain how meiosis results in genetic.

Topics: 3 & & 10.1 Meiosis. 1 – Meiosis Preparation Read & Consider Understandings & What is the difference between meiosis.

 Human body cells have 46 chromosomes Meiosis Sexual Reproduction and Genetics  Each parent contributes 23 chromosomes Section 1  Homologous chromosomes—one.

Cell Division Review. What the four major stages of the cell cycle? Which stages make up interphase?

Meiosis Chapter 10.

 Human body cells have 46 chromosomes Meiosis Sexual Reproduction and Genetics  Each parent contributes 23 chromosomes Section 1  Homologous chromosomes—one.

Meiosis The ability to pass on traits is called heredity. – This ability is one of the unifying themes of biology as individual units of heredity (genes)

If parents have two copies of each chromosome, how do they pass on only one to their offspring? MEIOSIS is the process of cell division that decreases.

Mitosis/ Meiosis SC.912.L describe the specific events that occur in each of the stages of the cell cycle (which include the phases of mitosis:)

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.

Cell Growth and Reproduction By: Carly Baurer. Cell Cycle The cell cycle is divided into two main parts: interphase and mitosis. Interphase- the cell.

Mitosis vs. Meiosis Objective 1.

Meiosis SC.912.L

Mitosis/Meiosis JEOPARDY!!

Cell Reproduction and Inheritance

Chapter 10.1, Meiosis.

Like Mitosis, but half as good!

Cell Reproduction Chapter 6.

Cell Reproduction Centrioles Spindle Fibers Stem Cell G1 Phase

Asexual vs Sexual Reproduction

Quick Review of Mitosis: -Mitosis is the division of the nucleus

Anaphase II Telophase II

Jeopardy Meiosis I Meiosis II Gametes M vs M EXTRAS Q $100 Q $100

Meiosis II Meiosis II produces gametes with

Meiosis I results in 2 haploid daughter cells

MEIOSIS Making gametes….

Section 11.4 Meiosis.

Cells go through two rounds of division in meiosis.

Meiosis – a form of cell division that halves the number of chromosomes when forming reproductive cells, such as gametes (egg & sperm cells)

Meiosis Notes Unit 6.

Cell Division! Created by Educational Technology Network

Section 11.4 Meiosis.

Meiosis Notes Biology - Ms. Spinale.

Section 11.4 Meiosis.

Presentation transcript:

The Cell Cycle The cell cycle. Image from Purves et al., Life: The Science of Biology, 4th Edition, by Sinauer Associates ( and WH Freeman (

Interphase Not a part of cell division – consists of 3 stages: -G1 (first growth stage) addition of biomass and size -S (synthesis) DNA replication -G2 (second growth stage) reproduction/manufacture of enough organelles for 2 cells

Mitosis

Mitosis The events of Prophase. Image from Purves et al., Life: The Science of Biology, 4th Edition, by Sinauer Associates ( and WH Freeman ( used with permission.

Prophase The events of Prophase. Image from Purves et al., Life: The Science of Biology, 4th Edition, by Sinauer Associates ( and WH Freeman ( used with permission.

Metaphase and Anaphase The events of Metaphase and Anaphase. Image from Purves et al., Life: The Science of Biology, 4th Edition, by Sinauer Associates ( and WH Freeman (

Telophase The events of Telophase. Image from Purves et al., Life: The Science of Biology, 4th Edition, by Sinauer Associates ( and WH Freeman (

Results of each… Mitosis: 2 genetically identical daughter cells that are diploid (with pairs of chromosomes) Meiosis: 4 genetically diverse daughter cells that are haploid (with half of each chromosome pair)

Meiosis

Chromosomes Arranged in a Karyotype Image from Access Excellence Graphics Gallery

Chromosome Structure as related to Meiosis Structure of a eukaryotic chromosome. Image from Purves et al., Life: The Science of Biology, 4th Edition, by Sinauer Associates ( and WH Freeman ( Structure and main features of a spindle apparatus. Image from Purves et al., Life: The Science of Biology, 4th Edition, by Sinauer Associates ( and WH Freeman ( Sister chromatids = copies of the chromosomes (DNA wound around proteins)

Meiosis 1 Major events in Prophase I. Image from Purves et al., Life: The Science of Biology, 4th Edition, by Sinauer Associates ( and WH Freeman (

Meiosis 1 Events in prophase and metaphse I. Image from Purves et al., Life: The Science of Biology, 4th Edition, by Sinauer Associates ( and WH Freeman ( The events of Telophase I. Image from Purves et al., Life: The Science of Biology, 4th Edition, by Sinauer Associates ( and WH Freeman (

Meiosis 2 The events of Prophase II. Image from Purves et al., Life: The Science of Biology, 4th Edition, by Sinauer Associates ( and WH Freeman ( The events of Metaphase II and Anaphase II. Image from Purves et al., Life: The Science of Biology, 4th Edition, by Sinauer Associates ( and WH Freeman (

Meiosis 2 The events of Telophase II. Image from Purves et al., Life: The Science of Biology, 4th Edition, by Sinauer Associates ( and WH Freeman (

Sources of Variation Crossing over Independent assortment of chromosomes Segregation of allele pairs (genes) Crossing-over between homologous chromosomes produces chromosomes with new associations of genes and alleles. Image from Purves et al., Life: The Science of Biology, 4th Edition, by Sinauer Associates ( and WH Freeman (

Image from Access Excellence Graphic Gallery ence.com/AB/GG/comp arison.html Comparison of Mitosis and Meiosis