Sex Notes Biology

1. Sex Notes Biology/ Hopson

2. Definition of Sex The property or quality by which organisms are classified as female or male on the basis of their reproductive organs and functions. Either of the two divisions, designated female and male, of this classification. Females or males considered as a group. The condition or character of being female or male; the physiological, functional, and psychological differences that distinguish the female and the male. See Usage Note at gender. The sexual urge or instinct as it manifests itself in behavior. Sexual intercourse. The genitals. Stedman�s Dictionary

3. Two Main Schemes Organisms Use To insure That Genetic Information Is Passed To The Next Generation: Asexual Reproduction Sexual Reproduction 

4. Terms Gamete (n) Mature male or female reproductive cell (sperm or ovum) with a � the chromosomes need to make a complete organism (23 for humans). Zygote 2n A zygote is the product of the fusion of an egg and a sperm (embryo). It contains a complete copy of the chromosome -- one from each parent.

5. A type of reproduction involving only one parent that produces genetically identical offspring by budding or division of a single cell or the entire organism into two or more parts. (Bacteria, single celled organisms, and some plants)

6. Sexual Reproduction A type of reproduction in which two parents give rise to offspring that have unique combinations of genetic material that is different from the parents and other offspring (Animals, plants, fungi, protists and bacteria!

7. Hermaphrodite An individual that functions as both male and female in sexual reproduction by producing both sperm and egg. (i.e. plants, animals).

8. Flowers contain the sexual organs of plants, most plants have organs to produce both the male and the female gametes inside the flower, whereas most animals produce only male or only female gametes. 

9. Special Note Dean Ballard once said �Biology is a mess!�� This is true! Many bacteria can engage in sex and some animals are hermaphroditic! As a matter o� fact, when it comes to the way life adapts to the environment in which it occupies, there is most likely an exception to every rule.

10. Angiosperms Today we will focus our attention on the Kingdom called. There are two different kinds of plants, gymnosperms and angiosperms. Gymnosperms (naked seeded plants with pinecones) are interesting, but today we will learn about Angiosperms. The term Angiosperm is derived from two Greek words: �," (or vessel) and "sperma" (or seed). In all angiosperms, the seeds are enclosed in a leaflike structure where the female sex parts exist.

14. All angiosperms reproduce with what we humans lovingly call �flowers�. 

15. Flowering plants are great because. . . . � They do not need water for the gametes to be fertilized They often have both male and female parts Their�petals can attract pollinators (Think of a pretty flower as a McDonalds sign, advertising food (nectar) for pollinators like The Birds and Bees. �

16. Today you will observe and sketch the main reproductive parts of a flowering plant. You should walk away from class knowing what each part does and what it looks like.

17. Male Stamen (which includes)� Anther Filament Female Pistil (Which includes) Style Ovary Stigma � Other Relevant Parts Petal Stem