Chapter 5. Sexual reproduction

Slides:

Advertisements

Similar presentations

Meiosis is a special form of cell division.

Advertisements

Chapter 6 Meiosis.

Meiosis Chapter 4.3 Guided Notes.

Bellwork: Identify which “PHASE” the cells are going through and DRAW that cell.

Chapter 4.3.  Gametes:  Reproductive cells. They contain half the usual number of chromosomes.  Egg:  Gamete that is formed by the female.  Sperm:

MEIOSIS: The Production of Sex Cells *Click for Animation*

The Birds and the Bees: Meiosis Chapter 10. Meiosis exists for two major reasons: To divide the number of chromosomes To create genetic variability.

Mitosis vs. Meiosis. What is the difference Mitosis is asexual reproduction. Does not produce a new organism. Mitosis is asexual reproduction. Does not.

Mitosis/Meiosis How do your cells divide?. A few words before we start….. Haploid:n one set of chromosomes Diploid: 2n two sets of chromosomes.

6.1 Chromosomes and Meiosis KEY CONCEPT Gametes have half the number of chromosomes that body cells have.

You have body cells and gametes.

Sexual reproduction involves the combining of two parent cells to create a completely new cell, which becomes the offspring. Most cells in the human body.

Mitosis & Meiosis. Mitosis Asexual Cellular Reproduction Asexual Cellular Reproduction.

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.

The Cell and Inheritance What is the difference between sexual and asexual reproduction? What are the differences between mitosis and meiosis? How many.

SECTION 6.1 CHROMOSOMES AND MEIOSIS. YOU HAVE BODY CELLS AND GAMETES  Somatic Cells  Definition: body cells; make up most of your body tissues and organs;

Slide 1 of 35 Copyright Pearson Prentice Hall biology.

Mitosis is how normal cells divide.

The nucleus of a cell contains chromosomes. Chromosomes carry genes.

MEIOSIS Creating gametes (sex cells).

Meiosis Chapter 10.1 and 11.3.

Concept: Compare the Process of Mitosis and Meiosis

Mitosis & Meiosis What’s the difference?.

Meiosis Biology.

You have body cells and gametes.

You have body cells and gametes.

KEY CONCEPT Gametes have half the number of chromosomes that body cells have.

Mitosis vs. Meiosis.

You have body cells and gametes.

HOMEWORK: VOCABULARY somatic cell gamete homologous chromosome

Some helpful definitions

You have body cells and gametes.

You have body cells and gametes.

How cells create gametes

Sexual Reproduction.

The student is expected to: 6A identify components of DNA, and describe how information for specifying the traits of an organism is carried in the DNA.

MEIOSIS AND SEXUAL REPRODUCTION

Sexual Reproduction.

Meiosis Vocabulary Gametes- cells that contain ½ the usual # of chromosomes (because = 46) Egg- female gamete (1n) Sperm- male gamete (1n) Fertilization-

Meiosis and Sexual Reproduction.

Meiosis Gamete Formation.

You have body cells and gametes.

You have body cells and gametes.

You have body cells and gametes.

Meiosis Biology.

Meiosis Making the sex cells.

You have body cells and gametes.

You have body cells and gametes.

You have body cells and gametes.

You have body cells and gametes.

Unit 9 lesson 2: Meiosis

Genes, Chromosomes & Numbers

Reproduction Definitions

You have body cells and gametes.

Determining the Basis of Life

Cell Reproduction.

You have body cells and gametes.

You have body cells and gametes.

You have body cells and gametes.

You have body cells and gametes.

Chromosomes and Meiosis

You have body cells and gametes.

Presentation transcript:

Chapter 5. Sexual reproduction Recap Question 17 – 21 (in class) Homework Understand what mitosis And meiosis means Next Lessons Meiosis Plant reproduction Bricks Biology Volume 1 Chapter 5 Plants.

Chromosomes We said we get half of the genes from mother and half from fathers. What does this mean? Chromosomes.

Keywords Cell division - Meiosis Gametes ( sex cells) - Mitosis Zygote Haploid (1n) Diploid (2n) Chromosomes

Cell division Cell division Mitosis = Diploid (2n) = Meiosis: produces cells which have half the usual number of chromosomes. Mitosis: makes a new set of chromomes so that each new cell gets its own exact copy of the information. Cell division Mitosis = The haploid number is the number of chromosomes within thenucleus of a cell that constitutes one complete chromosomal set. A diploid cell is a cell that contains two sets of chromosomes. The diploid number of a cell is the number of chromosomes in the cell. This number is commonly abbreviated as 2n, where n stands for the number of chromosomes. For humans this equation would be 2n=46. Humans have 2 sets of 23 chromosomes for a total of 46 chromosomes: Diploid (2n) = In Humans 2n = 2x23 = 46)

Meiosis: produces cells which have half the usual number of chromosomes. Haploid (n) = Our sex cells (sperm and eggs) are haploid cells that are produced by meiosis. In Humans sex cells (n = 1x23 = 23)

46 23 46