Sexual Reproduction

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Quick Review

Meiosis - division of cells which results in the production of gametes

Gametes - also known as sex cells, germ cells, or spores; cells of sexual reproduction, which contain only half the chromosomes of a normal cell highered.mcgraw-hill.com/sites/0072549238/

student_view0/glossary.html

Chromosomes - Threadlike bodies found in the nucleus, or center part, of a cell that carry the information of heredity. www.sharedexperience.org/Glossary.lasso

Slide 2

Sexual Reproduction

Definition:

Process in which two cells, termed gametes, come together to form one fertilized cell that contains genetic information from both parental cells. ucbiotech.org/glossary/

Production of offspring whose genetic constitution is a mixture of that of two potentially genetically different gametes. evolution.unibe.ch/teaching/GlossarE.htm

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Q: How many of you have more than one parent?

then, everyone in this room is a product of sexual reproduction

AnimationFactory.com

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Characteristics of Sexual Reproduction

Requires a female and male parent (i.e. it takes two to tango)

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Q: Why do we need more than 1 parent?

½ + ½ = 1

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Characteristics of Sexual Reproduction

Requires a female and male parent

Each parent donates ½ of the Chromosomes/Genes/DNA

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So, by what we’ve discussed, in sexual reproduction “mom” donates half, and “dad” donates half. How does this happen?

Slide 8

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

Slide 9

Now, nine months later, you come out kicking and screaming (and dancing). To which parent do you look exactly alike? How about your siblings? Do you look exactly alike them?

Take a moment to write down one trait that is different and in what way it is different.

*Dancing baby graphics and music courtesy of MegaBaby.com*

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