You have body cells and gametes.

Slides:

Advertisements

Similar presentations

Section 6-1 “Chromosomes & Meiosis”

Advertisements

Meiosis is a special form of cell division.

Answer the following questions on a separate piece of paper

1 Meiosis and genetic variation. Introduction 2 3 Genes DNA is organized in chromosomes. –Genes have specific places on chromosomes.

6.1 Chromosomes and Meiosis Section 6-1: “Chromosomes and Meiosis” Write everything that is underlined.

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*

Meiosis Cell division process whereby the number of chromosomes in a diploid cell is reduced by half through the separation of homologous chromosomes.

EQ: What are the major differences between Meiosis and Mitosis?

Meiosis and Mendel Chapter KEY CONCEPT Gametes have half the number of chromosomes that body cells have.

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

You have body cells and gametes.

What are we learning today?

You have body cells and gametes.

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

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;

There are 2 main types of cells in your body:

5c. Meiosis Chapter 6.1 & 6.2.

6.1 Chromosomes and Meiosis

Science Content Standards

(1) Division and differentiation in human cells

Review How many chromosomes do you have in each cell?

Mitosis and Meiosis.

Day one of Meiosis.

Mom Dad Human body cells have 23 pairs of chromosomes and 46 total Each pair of chromosomes is called Homologous pairs and have copies of the same genes.

You have body cells and gametes.

MITOSIS & MEIOSIS INFO.

Concept: Compare the Process of Mitosis and Meiosis

You have body cells and gametes.

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.

Mitosis vs. Meiosis.

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.

You have body cells and gametes.

HOMEWORK: VOCABULARY somatic cell gamete homologous chromosome

Some helpful definitions

Chromosomes and Meiosis

You have body cells and gametes.

You have body cells and gametes.

Meiosis & Gamete Formation

You have 2 types of cells: somatic cells and gametes.

You have body cells and gametes.

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.

Sexual Reproduction.

Section 6-1 “Chromosomes & Meiosis”

5.4 Asexual Reproduction KEY CONCEPT Many organisms reproduce by cell division.

You have body cells and gametes.

You have body cells and gametes.

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.

You have body cells and gametes.

Genes, Chromosomes & Numbers

Reproduction Definitions

You have body cells and gametes.

You have body cells and gametes.

You have body cells and gametes.

You have body cells and gametes.

The formation of gametes

You have body cells and gametes.

You have body cells and gametes.

Chromosomes and Meiosis

You have body cells and gametes.

Presentation transcript:

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

You have body cells and gametes. Body cells are also called somatic cells. Germ cells develop into gametes. Germ cells are located in the ovaries and testes. Gametes are sex cells: egg and sperm. Gametes have DNA that can be passed to offspring. body cells sex cells (sperm) sex cells (egg)

Your cells have autosomes and sex chromosomes. Your body cells have 23 pairs of chromosomes. Homologous pairs of chromosomes have the same structure. For each homologous pair, one chromosome comes from each parent. Chromosome pairs 1-22 are autosomes. Sex chromosomes, X and Y, determine gender in mammals.

Body cells are diploid; gametes are haploid. Fertilization between egg and sperm occurs in sexual reproduction. Diploid (2n) cells have two copies of every chromosome. Body cells are diploid. Half the chromosomes come from each parent.

Haploid (n) cells have one copy of every chromosome. Gametes are haploid. Gametes have 22 autosomes and 1 sex chromosome.

Chromosome number must be maintained in animals. Many plants have more than two copies of each chromosome. Mitosis and meiosis are types of nuclear division that make different types of cells. Mitosis makes more diploid cells.

Meiosis makes haploid cells from diploid cells. Meiosis occurs in sex cells. Meiosis produces gametes.