Meiosis and Fertilization myOHsis What is Meiosis Meiosis
![Meiosis and Fertilization my-OH-sis Meiosis and Fertilization my-OH-sis](https://slidetodoc.com/presentation_image/c967ef352e725f3c04f2af5f04ebaa1a/image-1.jpg)
![What is Meiosis? Meiosis is cell division used for: • Producing gametes (sex cells) What is Meiosis? Meiosis is cell division used for: • Producing gametes (sex cells)](https://slidetodoc.com/presentation_image/c967ef352e725f3c04f2af5f04ebaa1a/image-2.jpg)
![Meiosis • Part of it looks like mitosis! Meiosis • Part of it looks like mitosis!](https://slidetodoc.com/presentation_image/c967ef352e725f3c04f2af5f04ebaa1a/image-3.jpg)
![Meiosis • DNA replicates once, cell divides twice • Creates haploid (n) sex cells Meiosis • DNA replicates once, cell divides twice • Creates haploid (n) sex cells](https://slidetodoc.com/presentation_image/c967ef352e725f3c04f2af5f04ebaa1a/image-4.jpg)
![Prophase 1 • Chromosomes become visible and the nuclear membrane breaks apart • Crossing Prophase 1 • Chromosomes become visible and the nuclear membrane breaks apart • Crossing](https://slidetodoc.com/presentation_image/c967ef352e725f3c04f2af5f04ebaa1a/image-5.jpg)
![Metaphase 1 vs. 2 • Metaphase 1 homologous chromosomes pair up in the middle Metaphase 1 vs. 2 • Metaphase 1 homologous chromosomes pair up in the middle](https://slidetodoc.com/presentation_image/c967ef352e725f3c04f2af5f04ebaa1a/image-6.jpg)
![Anaphase 1 vs. 2 • Anaphase 1 homologous chromosomes separate and move apart • Anaphase 1 vs. 2 • Anaphase 1 homologous chromosomes separate and move apart •](https://slidetodoc.com/presentation_image/c967ef352e725f3c04f2af5f04ebaa1a/image-7.jpg)
![Telophase 1 vs. 2 • Telophase 1 - Single cell splits into 2 cells, Telophase 1 vs. 2 • Telophase 1 - Single cell splits into 2 cells,](https://slidetodoc.com/presentation_image/c967ef352e725f3c04f2af5f04ebaa1a/image-8.jpg)
![Meiosis: A Second Look Meiosis: A Second Look](https://slidetodoc.com/presentation_image/c967ef352e725f3c04f2af5f04ebaa1a/image-9.jpg)
![One major point! • Meiosis results in 4 genetically different haploid daughter cells *These One major point! • Meiosis results in 4 genetically different haploid daughter cells *These](https://slidetodoc.com/presentation_image/c967ef352e725f3c04f2af5f04ebaa1a/image-10.jpg)
![Fertilization n + n = 2 n Haploid Egg cell Haploid Sperm cell Diploid Fertilization n + n = 2 n Haploid Egg cell Haploid Sperm cell Diploid](https://slidetodoc.com/presentation_image/c967ef352e725f3c04f2af5f04ebaa1a/image-11.jpg)
![](https://slidetodoc.com/presentation_image/c967ef352e725f3c04f2af5f04ebaa1a/image-12.jpg)
![Homework Review 1. Describe the main results of meiosis. 2. What are the principal Homework Review 1. Describe the main results of meiosis. 2. What are the principal](https://slidetodoc.com/presentation_image/c967ef352e725f3c04f2af5f04ebaa1a/image-13.jpg)
- Slides: 13
![Meiosis and Fertilization myOHsis Meiosis and Fertilization my-OH-sis](https://slidetodoc.com/presentation_image/c967ef352e725f3c04f2af5f04ebaa1a/image-1.jpg)
Meiosis and Fertilization my-OH-sis
![What is Meiosis Meiosis is cell division used for Producing gametes sex cells What is Meiosis? Meiosis is cell division used for: • Producing gametes (sex cells)](https://slidetodoc.com/presentation_image/c967ef352e725f3c04f2af5f04ebaa1a/image-2.jpg)
What is Meiosis? Meiosis is cell division used for: • Producing gametes (sex cells) ***Makes 4 different cells!***
![Meiosis Part of it looks like mitosis Meiosis • Part of it looks like mitosis!](https://slidetodoc.com/presentation_image/c967ef352e725f3c04f2af5f04ebaa1a/image-3.jpg)
Meiosis • Part of it looks like mitosis!
![Meiosis DNA replicates once cell divides twice Creates haploid n sex cells Meiosis • DNA replicates once, cell divides twice • Creates haploid (n) sex cells](https://slidetodoc.com/presentation_image/c967ef352e725f3c04f2af5f04ebaa1a/image-4.jpg)
Meiosis • DNA replicates once, cell divides twice • Creates haploid (n) sex cells • In humans, takes place in ovaries and testes
![Prophase 1 Chromosomes become visible and the nuclear membrane breaks apart Crossing Prophase 1 • Chromosomes become visible and the nuclear membrane breaks apart • Crossing](https://slidetodoc.com/presentation_image/c967ef352e725f3c04f2af5f04ebaa1a/image-5.jpg)
Prophase 1 • Chromosomes become visible and the nuclear membrane breaks apart • Crossing over occurs! • Creates new gene combinations!
![Metaphase 1 vs 2 Metaphase 1 homologous chromosomes pair up in the middle Metaphase 1 vs. 2 • Metaphase 1 homologous chromosomes pair up in the middle](https://slidetodoc.com/presentation_image/c967ef352e725f3c04f2af5f04ebaa1a/image-6.jpg)
Metaphase 1 vs. 2 • Metaphase 1 homologous chromosomes pair up in the middle • Metaphase 2 - single chromosomes line up in the middle
![Anaphase 1 vs 2 Anaphase 1 homologous chromosomes separate and move apart Anaphase 1 vs. 2 • Anaphase 1 homologous chromosomes separate and move apart •](https://slidetodoc.com/presentation_image/c967ef352e725f3c04f2af5f04ebaa1a/image-7.jpg)
Anaphase 1 vs. 2 • Anaphase 1 homologous chromosomes separate and move apart • Anaphase 2 - Chromatids separate and move apart
![Telophase 1 vs 2 Telophase 1 Single cell splits into 2 cells Telophase 1 vs. 2 • Telophase 1 - Single cell splits into 2 cells,](https://slidetodoc.com/presentation_image/c967ef352e725f3c04f2af5f04ebaa1a/image-8.jpg)
Telophase 1 vs. 2 • Telophase 1 - Single cell splits into 2 cells, goes right into Prophase 2 • Telophase 2 - Two cells each split, creating 4 haploid cells
![Meiosis A Second Look Meiosis: A Second Look](https://slidetodoc.com/presentation_image/c967ef352e725f3c04f2af5f04ebaa1a/image-9.jpg)
Meiosis: A Second Look
![One major point Meiosis results in 4 genetically different haploid daughter cells These One major point! • Meiosis results in 4 genetically different haploid daughter cells *These](https://slidetodoc.com/presentation_image/c967ef352e725f3c04f2af5f04ebaa1a/image-10.jpg)
One major point! • Meiosis results in 4 genetically different haploid daughter cells *These cells are sperm and eggs!
![Fertilization n n 2 n Haploid Egg cell Haploid Sperm cell Diploid Fertilization n + n = 2 n Haploid Egg cell Haploid Sperm cell Diploid](https://slidetodoc.com/presentation_image/c967ef352e725f3c04f2af5f04ebaa1a/image-11.jpg)
Fertilization n + n = 2 n Haploid Egg cell Haploid Sperm cell Diploid Zygote 23 chromosomes 46 chromosomes
![](https://slidetodoc.com/presentation_image/c967ef352e725f3c04f2af5f04ebaa1a/image-12.jpg)
![Homework Review 1 Describe the main results of meiosis 2 What are the principal Homework Review 1. Describe the main results of meiosis. 2. What are the principal](https://slidetodoc.com/presentation_image/c967ef352e725f3c04f2af5f04ebaa1a/image-13.jpg)
Homework Review 1. Describe the main results of meiosis. 2. What are the principal differences between mitosis and meiosis? 3. What do the terms diploid and haploid mean? 4. What is crossing-over? 5. In human cells, 2 N=46. How many chromosomes would you expect to find in a sperm cell? In an egg cell? In a white blood cell? Explain.
Bird fertilization internal or external
Does meiosis occur after fertilization
When does crossing over occur during meiosis?
Difference between meiosis 1 and 2
Chapter 10 section 1 meiosis
Chapter 10 section 1 meiosis
Section 39-4 fertilization and development
Lesson 15.4 ovulation fertilization and implantation
Fertilization and implantation
Cleavage
Meiosis i vs meiosis ii
Meiosis 1
Prophase ii meiosis
Salamander external fertilization