Lesson Overview Lesson OverviewReproduction Lesson Overview 28.3 Reproduction.

Slides:



Advertisements
Similar presentations
Sexual and Asexual Reproduction
Advertisements

REPRODUCTION.
Infer Why might sexual reproduction, as opposed to asexual reproduction, produce a population better able to survive disease or environmental changes.
Sexual and Asexual Reproduction
Introduction to the Cell Cycle
Biodiversity: Sexual vs Non-sexual reproduction “ Joy in looking and comprehending is natures most beautiful gift.” Einstein.
Sexual vs. Asexual Reproduction
Animal Reproduction Sexual & Asexual By Diana L. Duckworth
 Sexual Reproduction – type of reproduction in which the genetic materials from two different cells combine, producing an offspring  Sperm – male sex.
Science 9: Unit A – Biological Diversity Topic 3: Passing It On.
Chapter 13 Meiosis and Sexual Life Cycles
Biology Unit 8 – Cell Division Notes #2 (Chapter 5)
Lesson 1 Sexual Reproduction and Meiosis
Reproduction Reproduction is the transfer of genetic material from parent to offspring. Genetic material contains information that controls how a new individual.
Organismal Biology Reproduction. Sexual and asexual.
Many organisms reproduce by cell division.
KEY CONCEPT Many organisms reproduce by cell division.
Section 2: Sexual vs Asexual Reproduction Chapter 7.
Do animals reproduce? How is it possible?.
Sexual Reproduction and Fertilization. ☺Sexual Reproduction— offspring are formed when genetic information from more than one parent combines It requires.
Biology 7.2 Sexual Reproduction
Mitosis vs. Meiosis. What is the difference Mitosis is asexual reproduction. Does not produce a new organism. Mitosis is asexual reproduction. Does not.
INVERTEBRATES REPRODUCTION
Sexual Reproduction Advantages and Disadvantages.
Do animals reproduce? How is it possible?. The animals reproduce: a. asexually b. sexually c. like the plants d. a and b are correct d. a and b are correct.
Animal Cell.
Reproduction An Overview. Reproduction Reproduction is the process by which an organism produces others of its same kind It is the way a species is continued.
Reproduction in Yeasts. 1.How do yeasts reproduce? Yeasts reproduce by carrying out a process of cell division called budding.
REPRODUCTION AP BOOK: CHAPTER 46 LOREN MCLENDON. Animal Reproduction (46.1) Reproduction: the creation of new individuals from old ones –A population.
In asexual reproduction, are the offspring different or the same as the parent? Answer: SAME! They are clones and genetically identical.
CHAPTER 6 SECTION 3 ANIMAL REPRODUCTION AND FERTILIZATION.
Reproduction in Animals. Asexual Reproduction Remember, asexual reproduction means = a single living organism can produce one or many identical individuals.
Meiosis The “naughty” one. Video: Why reproduce? To make more offspring -> Which contributes to the population -> Which continues the to the species as.
 Sexual reproduction is a type of reproduction in which the genetic materials from two different cells combine, producing an offspring. Sexual reproduction.
CHAPTER 46 ANIMAL REPRODUCTION Copyright © 2002 Pearson Education, Inc., publishing as Benjamin Cummings Section A: Overview of Animal Reproduction 1.
Reproduction No organism lives forever. Even the oldest tree will eventually die one day. In order for each species, or type of organism, to continue,
 Gamete  A sperm or egg cell, containing half the usual number of chromosomes of an organism which is found only in the reproductive organs of an organism.
Sexual vs. Asexual Reproduction. Extra chromosomes allow all female lizards to reproduce without males  double their chromosomes twice before everything.
Heredity. The passing of genetic information from one generation to the next generation.
Animals Chapter 1 Species-a group of organisms that can mate with each other and produce offspring, who in turn can mate and reproduce. (Notes) animals.
Reproduction of Organisms
Cell Division and Meiosis
Reproduction The Continuity of Life Reproduction Sexual Asexual
Reproductive System in Animals
Sexual vs Asexual Reproduction
Section 1: Reproduction
Types of Reproduction in the Animal Kingdom
JH-KEADLE Types of Reproduction.
Sexual vs. Asexual Reproductions
Sexual and Asexual Reproduction
Bellwork: How do some offspring of animals survive when parents provide little – no parental care? Why is maternal care an important mammalian characteristic?
Reproduction Bell ringer: Name and explain 1 thing that may increase the risk of cancer.
Ch. 4 Reproduction of Organisms
Sexual Reproduction Cells divide by Meiosis
Fertilization & Sexual Reproduction
Lesson Overview 28.3 Reproduction.
Reproductive system.
Meiosis.
7th Life Science Betsy Sanford Lost Mountain Middle School
Sexual Reproduction Involves the union of reproductive cells (gametes) from two different parents, called fertilization and results in the formation of.
Year 10, Pathway C 2012 New Generations.
Sexual vs. Asexual Reproduction
Sexual and Asexual Reproduction.
Sexual vs. Asexual Reproduction
Advantages and Disadvantages of Asexual Reproduction
Asexual vs Sexual Reproduction
Types of Reproduction Asexual Sexual.
Asexual Vs. Sexual Reproduction
Sexual Reproduction.
Sexual Reproduction.
Presentation transcript:

Lesson Overview Lesson OverviewReproduction Lesson Overview 28.3 Reproduction

Lesson Overview Lesson OverviewReproduction Asexual Reproduction Asexual reproduction requires only one parent, so individuals in favorable environmental conditions can reproduce rapidly. Carry only a single parent’s DNA, they have less genetic diversity than do offspring produced sexually. Lack of genetic diversity can be a disadvantage to a population if its environment changes.

Lesson Overview Lesson OverviewReproduction Asexual Reproduction Animals reproduce asexually in many ways. Some cnidarians divide in two. Budding produces new individuals as outgrowths of the body wall. Parthenogenesis-produces offspring that carry DNA inherited only from their mothers. Ex.) Females of some species can reproduce asexually by producing eggs that develop without being fertilized.

Lesson Overview Lesson OverviewReproduction Sexual Reproduction Sexual reproduction involves 2 species genetically diversity is an advantage When gametes (sperm and egg) join during fertilization- producing a zygote. Sexual reproduction maintains genetic diversity in a population-new combinations of genes. Genetic diversity is the raw material on which evolution operates. Sexually reproducing populations are better able to adapt to changing environmental conditions. Sexual reproduction requires 2 individuals of different sexes, so the density of a population must be high enough to allow mates to find each other.

Lesson Overview Lesson OverviewReproduction Sexual Reproduction In most animal species that reproduce sexually, each individual is either male or female. Among annelids, mollusks, & fishes, some species are hermaphrodites, which means that some individuals can be both male and female or can convert from one sex to the other. Clownfish, may change from one sex to the other as they mature.

Lesson Overview Lesson OverviewReproduction Reproductive Cycles A number of invertebrates have life cycles that alternate between sexual and asexual reproduction. Parasitic worms & cnidarians alternate between forms that reproduce sexually and forms that reproduce asexually.

Lesson Overview Lesson OverviewReproduction Reproductive Cycles Many cnidarians alternate between two body forms: polyps &medusas that swim freely in the water. Life cycle of the jellyfish: polyps produce medusas asexually by budding. The medusas reproduce sexually- eggs & sperm that are released into the water. After fertilization, the zygote grows into a free-swimming larva The larva eventually attaches to a hard surface & develops into a polyp continuing the cycle.

Lesson Overview Lesson OverviewReproduction Asexual and Sexual Reproduction How do asexual and sexual reproduction in animals compare?

Lesson Overview Lesson OverviewReproduction Asexual and Sexual Reproduction How do asexual and sexual reproduction in animals compare? Asexual reproduction requires only one parent, so individuals in favorable environmental conditions can reproduce rapidly. But since offspring produced asexually carry only a single parent’s DNA, they have less genetic diversity than do offspring produced sexually. Sexual reproduction maintains genetic diversity in a population by creating individuals with new combinations of genes.