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Sexual Reproduction Lesson
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Characteristics of Sexual Reproduction

Requires a female and male parent

Each parent donates ½ of the Chromosomes/Genes/DNA

Requires fertilization - the combining of gametes

Produces genetic diversity - variation among and within species that is attributable to differences in hereditary material. www.for.gov.bc.ca/hfd/library/documents/glossary/G.htm

Slide 11

Now, lets talk about this diversity. My sister has a big nose. Sheís not too thrilled with having this big nose. So letís try to convince her itís a good thing. Write down a reason it might be good to have a big nose.

Now, lets talk about this diversity. My sister has a big nose. Sheís not too thrilled with having this big nose. So letís try to convince her itís a good thing. Write down a reason it might be good to have a big nose.

Slide 12

Possible Reason:

Possible Reason:

Letís run with the answer that she would have a better ability to pick up the scent of food. What would happen if the food supply suddenly decreased and no one, including my sister, had a big nose that could sense this food supply?

Slide 13

EXTINCTION!!!!

EXTINCTION!!!!

But, my sister does have a big nose. So the human species is saved. Kinda makes big noses pretty attractive now, doesnít it?

Slide 14

So what can we conclude about Sexual Reproduction?

So what can we conclude about Sexual Reproduction?

it produces diversity

diversity ensures survival of a species in an environment that changes

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