Human Reproduction and Alleles

Slides:

Advertisements

Similar presentations

Meiosis is a special form of cell division.

Advertisements

________________ Taking another look at DNA #1. DNA… A Quick Review #2.

Meiosis and Karyotypes

Learning Objectives: I can explain…  …how Sexual Reproduction is different from Asexual Reproduction.  …how sex cells are created and how this is different.

Sexual Reproduction and Meiosis. Reproduction Organisms can reproduce asexually - mitosis, fission, & budding.

Lesson 1 Sexual Reproduction and Meiosis

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

Sex Cells Gametes (germ cells) Eggs and Sperm Somatic Cells All other cells Questions: 1, 2, 3, 4.

 Identify some patterns of inheritance in humans.  Describe the function of the sex chromosomes.  Explain the relationship between genes and the environment.

Reebops: a “model” organism for learning genetics.

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

Chapter 4 Modern Genetics Thursday, December 10, 2009 Pages

You and Your Genes Revision Lesson 1. What are Genes? All living organisms are made of cells All living organisms are made of cells Most cells have a.

MEIOSIS (textbook section 3.1 pg 74).  Sexual reproduction produces offspring that is genetically similar, but different from the parents. This is accomplished.

Mitosis vs. Meiosis Division of body cells and sex cells.

Learning Target: Mitosis v. Meiosis I Can…Compare and contrast key points between the process of mitosis and the process of meiosis to explain why there.

Section 8.1 Chromosomes.

Bellringer How many chromosomes do we get from our mom? How many chromosomes do we get from our dad? How many total chromosomes do we have in our bodies?

Sexual Reproduction and Meiosis. Reproduction Organisms can reproduce asexually - mitosis, fission, & budding.

You have body cells and gametes.

10.2 MEIOSIS Martin GENES, CHROMOSOMES, AND NUMBERS A. Dipolid and Haploid Cells: ▫Diploid Cells: cell that have two of each kind of chromosome.

5.3 The Cell and Inheritance

Sex Cells and Inheritance

Meiosis: Creation of the Sex Cells. What is Meiosis?? Meiosis- creation of sex cells (eggs, sperm) Meiosis- creation of sex cells (eggs, sperm) Occurs.

Do Now Fill in the blank: Asexual reproduction is to mitosis as Sexual reproduction is to _________ Answer the following questions: What are homologous.

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

Chapter 4, Section 1. Traits are controlled by: A single gene with 2 alleles. OR A single gene with multiple alleles. OR Many genes that act together.

Learning Target: Mitosis v. Meiosis I Can…Compare and contrast key points between the process of mitosis and the process of meiosis I Will… Describe the.

Activity 63: Show Me the Genes!

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;

Warm Up Answer the following questions: 1. Chromosomes contain DNA. What is DNA? 2. What do you think is an important function of DNA?

Meiosis Review.

Think about the traits that make people unique

Meiosis & Sexual Reproduction

Meiosis: Making Sex Cells Aim: How are sex cells made?

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.

Meiosis & Sexual Reproduction

Meiosis & Sexual Reproduction

Chapter 6 Sections 1,2 and 6 Pages ;

MITOSIS & MEIOSIS INFO.

Mitosis and Meiosis When Cells Divide.

Mitosis vs. Meiosis.

Meiosis & Sexual Reproduction

HOMEWORK: VOCABULARY somatic cell gamete homologous chromosome

Chromosomes and Meiosis

Chapter 10 Section 1 Meiosis.

Cellular Reproduction

Cell Reproduction 8.1 (p ) Sex chromosomes = determine the sex of the organism and other related characteristics Named X and Y Females are XX males.

11.1 Reproduction I. Asexual Reproduction (Single Individual involved)

How do organisms create offspring through sexual reproduction?

Sexual Reproduction.

Meiosis Chapter 10.1 and 11.3.

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.

Start-up for 12/9/14 Refer to the karyotype on the right. Is this a male or female? Explain. What are autosomes? Which chromosomes in this karyotype.

Lesson 19 What is meiosis?.

Sexual Reproduction.

Meiosis & Sexual Reproduction

Lesson 2: Sexual Reproduction

Chromosome Review Chromosomes—those strands of DNA and protein inside the cell nucleus—are the carriers of genes. The genes are located in specific positions.

Mitosis and Meiosis When Cells Divide.

You have body cells and gametes.

Reproduction Definitions

Fertilization The process of haploid gametes joining together to form a diploid cell with 2n chromosomes. n chromosomes come from the male parent and n.

Meiosis & Sexual Reproduction

MITOSIS & MEIOSIS INFO.

Presentation transcript:

Human Reproduction and Alleles Genetics Week 2

I Can… I Can#12: explain that sexual reproduction produces offspring that inherit half their DNA from each parent. I Can#13: describe the difference between a diploid and a haploid cell. I Can #14: explain how genes are carried from parents to their offspring on chromosomes

How many pairs of chromosomes does the human cell have? Human Chromosomes Within the nucleus of almost every human cell there are 46 chromosomes. These chromosomes come in pairs. How many pairs of chromosomes does the human cell have? 23 pairs

What is a diploid cell? We say that cells with the full set of 23 pairs or 46 total chromosomes are DIPLOID.

Chromosomes and Life When a child is missing a chromosome or has an extra chromosome serious complications can occur. Example: Down Syndrome

Chromosomes and Reproduction So, how do humans get the full set of 46 chromosomes?

Chromosomes and Reproduction Because humans reproduce through sexual reproduction, they inherit half or 50% of their DNA from each parent. SO, they inherit 23 chromosomes from each parent. What if they mated ppt.?

Inheriting Chromosomes But if human cells have 46 chromosomes each, how does the baby end up with the correct number of chromosomes? 92 46 from Dad 46 from Mom + = YIKES!!

Sex Cells Sex cells, the SPERM and the EGG, are special cells because each of these cells contains only 23 chromosomes.

Sex Cells Because each sex cell has only 23 chromosomes we say they are HAPLOID (think “HAlf-diPLOID” 46/2= 23

What will the baby look like? Because chromosomes carry genes, when the two sex cells meet and the chromosomes form pairs--the baby ends up with 2 alleles for each trait. DAD’S MOM’S

Girl or Boy? SEX CHROMOSOMES: are one of the 23 pairs of chromosomes in each body cell. The SEX CHROMOSOMES carry genes that determine whether a person is male or female.

XY It’s a BOY If you are a boy, your two sex chromosomes do not match. One of them is an X chromosome, and the other is a Y chromosome. XY

XX It’s a GIRL If you are a girl, your two sex chromosomes match. The two sex chromosomes are called X chromosomes. XX