DO NOW: TAKE 4 HANDOUTS FORM FRONT 1. Take out Reinforcement Activity. 2. Take 2 colored pencils from the tray

and sit quietly and write down HW HW: Complete the venn diagram Read pages 80-85 in textbook Study for Meiosis and Reproduction Quiz Bring in your journals (composition

book) if you have not already done so.

Why do genetics and heredity exist?

 Life is continuous because of reproduction & development.

Reproduction is necessary for the survival of the species, but not the organism.

There are two ways traits can be passed from parent to offspring.

Asexual reproduction  

Requires only one parent    Doesn’t involve sex cells (sperm & egg)    Results in growth of another individual    Offspring are clones of the parents (genetically

identical)

Ex: ParameciumPlants

Sexual reproduction

Requires two parents

 Involves specialized sex cells  Results in the production of another individual

Offspring are unique – not identical to parent

Ex: Humans Plants

Some organisms reproduce: asexually, sexually, or both ways.

Methods of Asexual Reproduction:   Budding - offspring grow out of the parent’s body  

Ex: Hydra  Internal buds - release a mass of cells that develops

internally     Ex: Sea sponge 

Fragmentation – organism splits in half   

Ex: Planaria (worms)  Regeneration - piece of the organism detaches & develops  Ex: Starfish

Method of Sexual Reproduction:

Sex cells join to create a fertilized egg.

(Draw in:

Fertilization & development can occur internally or externally.

Internal Fertilization Ex. Human, dogs

External Fertilization Ex. Turtles, plants, snake, fish

Internal Development Ex. Humans, monkey, cats

External Development Ex. Chicken, lizard, fish, platypus, insects