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WARM-UP#7 What type of cell division is the diagram above? What phase of cell division the arrow pointing to?
Characteristics of living thingsREMEMBER THE… Characteristics of living things Living things are made up of cells Unicellular – one celled organisms Multicellular – many celled organisms
Characteristics of living thingsLiving things reproduce to make offspring of the same species Sexual reproduction Asexual reproduction
Characteristics of living thingsLiving things grow and develop
MEIOSIS PROCESS OF REDUCTION DIVISION(CHOROMOSOME # IS CUT IN ½ BY SEPERATION OF HOMOLOGOUS CHROMOSOMES IN DIPLOID CELLS)
Chromosome number in body cells vs. gametes?Diploid (2N) - have 2 sets Gametes: Haploid (N) - have 1 set
Summarize the events of meiosis. (See also #5)
Summarize the events of meiosis. (See also #5)
What are the results of meiosis?4 haploid (N) cells Genetically different from each other & the original cell
Differences between Mitosis & Meiosis?MITOSIS produces 2 identical diploid (2N) cells MEIOSIS produces 4 different haploid (N) cells
Human cells 2N=46. How many chromosomes are in a…?Sperm Cell? 23 chromosomes Gamete is haploid (N) Egg Cell? White Blood Cell? 46 chromosomes Body cell is diploid (2N)
How does independent assortment apply to chromosomes?The “chromosomes” assort independently, not individual “genes”
Crossing-over & gene mapping?Farther apart 2 genes are, more likely they’ll be separated Frequency of crossing-over = to distance between 2 genes library.thinkquest.org/ 19037/genome3.html
How close are 2 usually independently assorted genes?Very far apart from each other.
? Any Questions???
6.6 Meiosis and Genetic Variation KEY CONCEPT Independent assortment and crossing over during meiosis result in genetic diversity.
Mitosis/Meiosis How are they different?. The exchange of DNA between the chromatid arms on homologous pairs is called ________________ Crossing over This.
Chapter 8: Meiosis Production of Sex Cells. Introduction Mitosis and Meiosis are somewhat similar, but have 2 completely different goals. Mitosis used.
Mitosis vs. Meiosis. What is the difference Mitosis is asexual reproduction. Does not produce a new organism. Mitosis is asexual reproduction. Does not.
What is mitosis? The way cells divide to produce more body cells.
Parents can produce many types of offspring Families will have resemblances, but no two are exactly alike. Why is that?
MEIOSIS (textbook section 3.1 pg 74). Sexual reproduction produces offspring that is genetically similar, but different from the parents. This is accomplished.
Mitosis & Meiosis. Mitosis Asexual Cellular Reproduction Asexual Cellular Reproduction.
Meiosis Chapter 4.3 Guided Notes. Let’s review…. Mitosis produces two genetically identical daughter cells. In sexual reproduction, offspring inherit.
DIPLOID Diploid = 2(n) In humans: n=23 chromosomes 2(n)= 46 total chromosomes 2 sets of each chromosomes Somatic cells are diploid Body Cells (nerve, muscle,
MEIOSIS Four haploid Algae Cells. MEIOSIS “Cell Division which produces Gametes with half the number of chromosomes in the parent’s body.” In humans,
Meiosis. Review: Homologous chromosomes Gametes Gene Diploid (2n) Haploid (n) Somatic cells Autosomes Sex chromosomes Mitosis.
Bellwork: Identify which “PHASE” the cells are going through and DRAW that cell.
Meiosis Practice Test. 1. Which of these is accomplished by meiosis? Choose all that apply. a. It allows multicellular organisms to get bigger in size.
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.
CHAPTER 11: INTRODUCTION TO GENETICS Standards B.1.8, B.1.21, B.1.28, B.1.29 Section 11.4: Meiosis.
Notes: Types of Reproduction ***Key Idea: Genetic information is passed from parents to offspring through CHROMOSOMES. Remember that chromosomes are DNA.
Notes E 4.3 Meiosis is a special form of cell division.
Biology Meiosis Notes 01/04/2012. Goals for the day 1.Be able to describe the differences between mitosis & meiosis 2.Be able to describe what a homologous.
Mitosis vs. Meiosis. Meiosis Mitosis Based on the diagram, The difference between mitosis and meiosis is that mitosis produces two identical daughter.
Slide 1 of 35 Copyright Pearson Prentice Hall biology.
Types of Reproduction Notes. Notes: Types of Reproduction ***Key Idea: Genetic information is passed from parents to offspring through CHROMOSOMES. Remember.
Asexual Reproduction. Sexual Reproduction recombination of genetic material More combinations means there is a higher chance at least some will survive.
MEIOSIS: The Production of Sex Cells *Click for Animation*
REPRODUCTION AND CONTINUITY OF LIFE. Reproduction Cell division MitosisMeiosis requires.
Chapter 13 Things you should know!. Asexual vs. Sexual reproduction Genes are segments of DNA that code for the basic units of heredity. (They are also.
Meiosis. Gamete vs. Zygote What is a Zygote? When two gametes come together (fertilization)
Meiosis Student Expectation: RECOGNIZE the significance of meiosis to sexual reproduction;
Meiosis Chapter 11.4 Objectives Describe how homologous chromosomes are alike and how they differ Contrast haploid and diploid cells Summarize the process.
Chromosome Made up of DNA and proteins. Chromatid ½ of a chromosome 2 chromatids = 1 chromosome TWO appear during the process of mitosis = SISTERS!
Meiosis and Sexual Reproduction Section 1 Section 2 Meiosis Sexual Reproduction.
Meiosis Sexual vs. Asexual Reproduction Haploid vs. Diploid Misc
Why does reproduction require 2 types of cell division? Asexual & Sexual Reproduction.
Meiosis and Genetic Variation Review Sections 6.1, 6.2, and
Chapter 11-4 Meiosis. Let’s make a sex cell! Meiosis – Production of haploid gametes Meiosis – Production of haploid gametes Diploid- has paired chromosomes.
1 Reproduction. 2 Production of new individuals is a fundamental characteristic of a living species. Genetic information is passed on from parental generation.
Chapter 10.1, Meiosis. Chromosomes and Genes Recall from chapter 9, during mitosis, the DNA (Chromatin) condenses into x-shaped structures called chromosomes.
Chapter 10 Sexual Reproduction and Genetics. Chapter 10.1 Meiosis.
© Boardworks Ltd of 8. 2 of 8© Boardworks Ltd 2009 Chromosome number A human somatic (body) cell contains 46 chromosomes. These consist of 23 pairs.
Chapter 10 Genetic Variability. You Must Know The importance of crossing over, independent assortment and random fertilization to increasing genetic variability.
Parents: Offspring: Cell division: Sexual Reproduction 46 MEIOSIS Produces ___________: _____________________.
6.1 Chromosomes and Meiosis KEY CONCEPT Gametes have half the number of chromosomes that body cells have.
End Show Slide 1 of 35 Copyright Pearson Prentice Hall 11-4 Meiosis.
Meiosis Cell division process whereby the number of chromosomes in a diploid cell is reduced by half through the separation of homologous chromosomes.
Meiosis and its role in sexual reproduction Themes: Organization Unity and Diversity.
Life Cycles (Mitosis and Meiosis). Mitosis Cell replication The segregation of identical chromosomes into 2 new cells, each containing exact copies of.
Meiosis 2n n n = number of chromosome Diploid: cells that have two copies of every chromosome Haploid: cells that have one copy of every chromosome Meiosis.
Meiosis and Mutations. Remember: Mitosis - takes place in regular body cells (somatic cells) and you end up with 2 identical diploid (2n) cells where.
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