Variation.

Slides:

Advertisements

Similar presentations

Variation and Inheritance LO: To learn how characteristics can vary.

Advertisements

Chapter 6 Meiosis.

Sexual and Asexual Reproduction

Environmental Biology & Genetics Factors Affecting Variety in a Species M r G D a v i d s o n.

29/08/2015 Inheritance and variation# Reproduction.

 Sexual Reproduction – type of reproduction in which the genetic materials from two different cells combine, producing an offspring  Sperm – male sex.

What is mitosis? The way cells divide to produce more body cells.

Sexual Reproduction & Inheritance.

SEXUAL REPRODUCTION Chapter 4 lesson 1 Part 1.

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

Reproduction What’s the difference in these two forms of reproduction?

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.

Handing Down Species’ Characteristics Section 2. Handing Down Species’ Characteristics.

GENETIC VARIATION. Genetic Variation Meiosis and sexual reproduction ensure that variation occurs in individuals within a population/species.

Reproduction and Variation. By the end of the lesson, you should be able to:  Describe asexual reproduction.  Describe sexual reproduction.  Explain.

Sexual and Asexual reproduction. A type of reproduction that involves only one parent and produces offspring that are genetically identical to the parent.

Fertilisation In Mammals  Sperm are produced in the testes  Eggs are produced in the ovaries  Fertilisation occurs when a sperm swims up the oviduct.

06/01/2016 Inheritance and Selection W Richards Worthing High School.

Human Reproduction and Alleles

Topic: Variation L1: Genetic Variation Learning Objectives: 1.Describe the two types of variation, genetic and environmental. 2.Explain how genetic information.

Sexual Reproduction and Genetics

What have these animals got in common?. To further our knowledge of reproduction 22 June 2016 Title - Reproduction Class work.

The Basics of Genetics Summarize how genetic information is passed from parent to offspring by using the terms genes, chromosomes, inherited traits,

Cell division in sexual reproduction

Date: February 28th, 2017 Aim # 53: How do organisms create offspring through sexual reproduction? ? HW: Daily Review of Class Notes Worksheet- Diploid.

Reproduction (X and Y chromosomes)

Inheritance and Selection

What’s the difference in these two forms of reproduction?

Inheritance and Selection

B2 Cell division: gametes, body, mitosis, once, repair, asexual, copied, growth, two, testes, twice, differentiate, four, fertilisation, gamete, genetic,

Inheritance and Selection

Inheritance and Selection

Inheritance and Selection

Characteristics of living things

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.

Reproductive system.

Chromosomes and Meiosis

You have body cells and gametes.

You have body cells and gametes.

Biology 1-2B Inheritance.

How do organisms create offspring through sexual reproduction?

Year 10, Pathway C 2012 New Generations.

You have body cells and gametes.

Where does my DNA Come From?

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.

11.1 Reproduction I. ___________Reproduction (__________Individual involved) A. Offspring created is __________ _________ to the parent B. Examples 1.

You have body cells and gametes.

Meiosis & Sexual Reproduction

Oct 24, 2016 Asexual Reproduction.

You have body cells and gametes.

Objective -1 Gene structure and organisation..

You have body cells and gametes.

You have body cells and gametes.

Chromosomes and Meiosis

You have body cells and gametes.

Presentation transcript:

Variation

Inherited and Environmental Characteristics List as many inherited and Environmental characteristics as you can......

Where is this information stored? Genetic information is stored by genes which are arranged on chromosomes: Section of a chromosome: Genes for eye colour Genes for blood group: Genes for hair colour Different species have different numbers of chromosomes. Humans have 46 (23 pairs) in every cell. 13/11/2018

Sexual reproduction Sexual reproduction involves two organisms of the same species. Each organism produces a GAMETE. For example, in animals the gametes are the egg and the sperm: When the sperm penetrates the egg the egg is fertilised and cells start to reproduce to form a new individual: 13/11/2018

In plants, the gametes are the eggSexual reproduction and pollen: Fertilisation Any type of sexual reproduction helps a species to become more varied because the offspring inherit characteristics from both parents. 13/11/2018

Where are the instructions for building your body found? How many chromosomes are there in a normal body cell. What is a gene? Using a diagram explain how the nuclei of sex cells are made. How does fertilisation occur in animals and plants? Using diagrams explain how the correct number of chromosomes is re-established.