We think you have liked this presentation. If you wish to download it, please recommend it to your friends in any social system. Share buttons are a little bit lower. Thank you!
Presentation is loading. Please wait.
Published byGary Rodgers
Modified about 1 year ago
Need-to-know Vocabulary Homologous Chromosomes Replicated Chromosome Centromere Kinetocore Sister Chromatid Tetrad
Like in the Interphase of mitosis, meiosis starts with the splitting of the centriole and the duplication of DNA
Now, the Chromatin coils into chromosomes and pair up with their homologous match. The centrioles move to the poles as the nuclear membrane and the nucleolus disappear
The homologous pairs move to the equator, and the centrioles attach spindle fibers to the kinetocore of the nearest chromosome.
Before metaphase I, homologous chromosomes will exchange pieces of DNA which is known as “crossing over” This process officially happens while in Prophase I.
The polar fibers retract, separating the homologous pairs.
The cell splits in two, each with one centriole and one set of replicated chromosomes. The spindle fibers will disappear.
Note: Many illustrations skip Interphase 2, because it’s considered unnecessary, and usually jump straight to Prophase 2 with the understanding that centrioles replicated.
The centrioles duplicate themselves again and move to the equator
The replicated chromo- somes move to the equator. The centrioles throw out their spindle fibers to attach to the kinetochores.
The polar fibers retract and separate the sister chromatids.
The spindle fibers disappear The chromosomes gather as the nuclear membrane and the nucleolus re-appear
Both cells divide, creating 4 separate haploid cells
Finally, the chromosomes uncoil into chromatin, completing meiosis
Meiosis The process in which the nucleus of a cell completes two successive divisions that produce four nuclei, each with a chromosome number that has.
Meiosis. Meiosis is the type of division which: 1. Reduces the chromosome # from diploid to haploid 2. Is used to produce gametes: eggs and sperm.
Cell Cycle: M Phase Mitosis and Cytokinesis. Cell Division (M phase) Occurs in two stages – Mitosis (nuclear division) – Cytokinesis (cytoplasmic division)
Mitosis and the Cell Cycle Cell reproduction. Todays Objectives The student will be able to identify the phases of the cell cycle and mitotic stages by.
Cell Cycle and Cell Division CST Review PowerPoint.
Meiosis and Sexual Reproduction. Sexual Reproduction Diploid Cell A cell that has chromosomes located in similar pairs. These cells are called body cells.
Meiosis Pgs Human body cells have 46 chromosomes Meiosis - General Overview Sexual Reproduction and Genetics Each parent contributes 23 chromosomes.
Cell Growth and Division Mitosis and Meiosis. Cell Growth When an organism grows, the number of cells increase but the size of each cell remains small.
Cell Division Mitosis Chapter 10. Why do cells divide, rather than continually grow forever? The larger a cell becomes, the more demands the cell places.
Biology AHSGE Standard VI- Mitosis and Meiosis. Biology AHSGE CONTENT STANDARD 6. Describe the roles of mitotic and meiotic divisions during reproduction,
Cell Division and Mitosis -Chapter 9- Honors Biology Program Mountain Pointe High School.
I.Sexual Reproduction --two parents combine. 1. The sex cell from the male parent is sperm. a. Sperm head is almost all nucleus (genetic info) 2. The.
Cellular Reproduction. Mitosi s I – Interphase: Period between division DNA molecules duplicate Single strands (chromatin threads) X shaped chromosomes.
Chapter Meiosis College Prep Biology Mr. Martino.
Copyright © The McGraw-Hill Companies, Inc. Permission required for reproduction or display. 4.8 Mitosis maintains the chromosome number of the parent.
Mitosis: The Dance of the Chromosomes. Once Interphase is done the cell is ready to begin Mitosis. Mitosis is when the cell divides.
M phase. DNA at different phases chromatin chromosome histone nucleosome.
Copyright © by Holt, Rinehart and Winston. All rights reserved. How are autosomal cells and sex cells different? Question of the Day 2-25.
The Cell Cycle. Chromosomes Carry genetic information in eukaryotes Carry genetic information in eukaryotes Made of DNA and proteins Made of DNA and proteins.
Meiosis Haploid (n)-- one set of chromosomes Diploid (2n)-- two sets of chromosomes Most plant and animal and adult cells are diploid (2n) Eggs and sperm.
Phases of Cell Division Interphase (stage between cell division) Interphase (stage between cell division) Prophase Prophase Metaphase Metaphase Anaphase.
AIM: What events take place at each phase of meiosis? DO NOW: What is the difference between gametes and body (somatic) cells? Define Homologous Chromosomes.
MEIOSIS AND SEXUAL LIFE CHANGES. YOU MUST KNOW… THE DIFFERENCES BETWEEN ASEXUAL AND SEXUAL REPRODUCTION THE ROLE OF MEIOSIS AND FERTILIZATION IN SEXUALLY.
Lecture 2 Cell Structure, Mitosis and Meiosis. Study Questions - Lecture 2 1)Describe the major components of a typical animal cell and their function(s).
Meiosis – the basis of sexual reproduction Section 6.1.
Cell Cycle Vocabulary and Notes Biology. Centrioles – one of two tiny structures located in the cytoplasm of animal cells near the nuclear envelope. Chromatid.
Cell Division. Two Parts of Cell Division (1) Mitosis – (2) Cytokinesis.
Genetics--Nuclear Division & Inheritance Mitosis & Meiosis.
The Cell Cycle Mitosis. The Cell Cycle The regular sequence of growth and division that cells undergo.
End Show Slide 1 of 38 Copyright Pearson Prentice Hall 10-2 Cell Division.
© 2016 SlidePlayer.com Inc. All rights reserved.