Asexual Reproduction in Protists & Monerans AND Comparing Sexual & Asexual Reproduction

Asexual Reproduction in Protists & Monerans ANDComparing Sexual & Asexual Reproduction

GOAL

To compare sexual and asexual reproduction in animals, protists and monerans

Define (glossary p. 731)

fertilization

Facts: previous knowledge

1.Male sex cell is called the __________

2. Female sex cell is called the __________

3. All body cells have ________ chromosomes; sex cells have _____ each so when they join together there will be a full set of 46

Animals: Sexual Reproduction

Sexual Reproduction in Animals

1. Animals, some plants, fungi, protists

2. 2 parents= male & female

3. Sex cells (Gametes)– Male= sperm– Female= egg

Sexual Reproduction Process:

Sperm fertilizes egg to form zygote (single cell)

Zygote divides repeatedly until it forms an embryo

Sexual Reproduction Process:

Embryo develops into a fetus (begins to look like parents)

Offspring is born

Sexual Reproduction Diagram

Create a flow chart with pictures to explain the process of sexual reproduction. Label the sperm, egg, zygote, cell division, embryo & fertilization point

Fertilization Animation

Fertilization Animation

Numbers of offspring

Humans- 1

Elephant/horse- 1

Cat- 4/5

Dog- 1/12

Animals: Sexual Reproduction

Sexual Reproduction in Animals

5. Appearance of offspring• a. Two parents

• b. Two sets of chromosomes

• c. Two sets of genes

• d. Genes mix- traits from both parents

Animals: Sexual Reproduction

Sexual Reproduction in Animals

6. Number of chromosomes

• In human body cells = 46 chromosomes

• In human sex cells = 23 chromosomes

Animals: Sexual Reproduction

Sexual Reproduction in Animals

7. Egg (23) + sperm (23) = 46 chromosomes

Animals: Sexual Reproduction

Sexual Reproduction in Animals

8. Once fertilization is completed, zygote divides by mitosis (asexual reproduction)

Review: Sexual Reproduction in Animals

Describe the process of fertilization

Review: Sexual Reproduction in Animals

Describe the development of an organism immediately after fertilization

Review: Sexual Reproduction in Animals

Compare the number of chromosomes in sex cells with the number of chromosomes in body cells

Asexual Reproduction Methods

Asexual Reproduction

Algae, amoeba

bacteria

growing animals, plants and fungi

Asexual reproduction

Cloning

http://www.brainpop.com/science/cellularlifeandgenetics/cloning/

Binary fission

http://www.classzone.com/books/hs/ca/sc/bio_07/animated_biology/bio_ch05_0149_ab_fission.html

Asexual reproduction

Budding

http://www.youtube.com/watch?v=489CSop00sY

Regeneration

http://www.youtube.com/watch?v=f7cXeWxxfD4&feature=related

Asexual reproduction

Asexual reproduction

http://www.brainpop.com/science/cellularlifeandgenetics/asexualreproduction/

Asexual Reproduction Methods

Binary Fission

1. Bacteria

2. Organism divides in half

3. 2 identical daughter cells produced (half the size of their parent)

4. Daughter grows to parental size- then divides

Binary Fission Images

Binary Fission Images

Binary Fission Clips

Asexual Reproduction Methods

Budding 1. Small bud grows out of parent cell (with identical DNA)

2. Bud breaks off when large enough

Ex. Hydra, potato

Hydra Budding Images

Asexual Reproduction Methods

Regeneration 1. Living things repair themselves by growing lost body parts from remaining cells

2. Ex: lobsters, starfish, lizards

Regeneration Pictures

Asexual Reproduction Methods

Cloning 1. Making exact copies of organisms – gets DNA from only one parent cell

2. Ex. Dolly the sheep

Cloning pictures

Comparing Asexual & Sexual Reproduction

Create a T-chart to compare the following:– How many parents?– Are sex cells needed? – What numbers of chromosomes are involved? (at

the beginning and at the end)– Are offspring different from or identical to parents

and why?– What types of organisms?

What are the advantages of each:

Asexual-

Sexual-

ANSWERS:

ADV.

Sexual- variation in traits

evolution

asexual- no mate needed

DISADV.

Comparing Reproduction Types

ASEXUAL– 46 --> 46– One parent– Cells produced are

identical to the parent- no gene mixing

– No– Some plants,

animals, and fungi

SEXUAL– 23 + 23 --> 46– Two parents– Cells produced are different

from their parents- due to gene mixing

– Yes– Bacteria, amoeba, algae,

growing plants, animals, and fungi

Websites

Animal Reproduction Animations

Animal Life Cycles