LO: SWBAT explain the difference between asexual and sexual reproduction and describe different types of asexual reproduction

DN: Explain the differences between sexual and sexual reproduction

HW: Vocabulary: chromosomes, asexual reproduction, sexual reproduction, binary fission, regeneration, budding, sporulation, vegetative propagation

Who thinks they can define Reproduction?

The process by which living things produce other living things like themselves.

The production of offspring.

What are Chromosomes?

XXXX

• found in the nucleus • determine our physical characteristics • Made of DNA • Instructions of cell• Passed on to offspring

cell

Found in Nucleus

Types of Reproduction: Asexual Reproduction

X XX X

X XX X

X XX X

Genetic Information(Chromosomes)

ParentOffspring

1) the creation of a new individual from only parent.1

2)Genetic information of offspring is to the parent.identical

Clones

Clones

Do the cells in our body undergo asexual reproduction?

Yes- mitosis

When do the cells of our body undergo Asexual

Reproduction?

Growth Repair

1. BINARY FISSION

The splitting of a one-celled organism into 2 equal halves.

Example: Bacteria & Ameba

2. Regeneration

The ability of organisms to grow back limbs if

they are cut off.

• If cut into 2 pieces each piece will be a new offspring.

• Will they be identical?

3. Budding: •a new cell is formed from a tiny bud

on the parent cell•Parent large and offspring small

•Example: hydra & yeast

Sporulation

• Each spore (plant offspring) is a clone

• mold

Vegetative Propagation

When roots, stems and leaves give rise

to a new plant

Types of Vegetative Propagation:

Natural:

1)Runners2)Bulbs3)Tubers4)Rhizomes

Artificial:

1)Cuttings2)Grafting

Runners

Offspring grow from one parent plant

Are they identical to parent plant?

Bulbs

Underground stem with fleshy leaves which store food

Tuber

Underground stem enlarged for storage of food

Rhizomes

•Stems that grow sideways underground. •New plants can grow from these stems.

Cuttings

Vegetative part of a plant is cut, and it can develop into a new plant.

Root Growth

Grafting

A cutting from one plant (scion) is attached to the main body of a rooted plant (stock).

What is Sexual Reproduction?

the joining of two cells to begin the development of a new individual.

These called: special cells are Sex Cells (Gametes)

Sexual Reproduction

XX + XXXXXX

Sperm

Egg Offspring

A fertilized egg cell is called a Zygote

1) Is the creation of a new individual from parents.2

2) Offspring are not genetically to the parents.

identical

What are the names of these sex cells?

Sperm Cell (Male)

Egg cell (Female)

The joining of a sperm cell with an egg cell is called

fertilization.

We get half our genetic information from mom and half

our genetic information from dad

23

23Females:Egg cells

Males:Sperm cells

Asexual vs. Sexual Reproduction

1 Parent

Offspring areidentical

Bacteria, Ameba,Body Cells

Produce Offspring

Critical for survival

of the species

2 Parents

Offspring are not identical

Humans, Dogs, Plants

Asexual Reproduction Sexual Reproduction