Asexual and Sexual Reproduction Mrs. Anna Ward Ridge Road MS Asexual and Sexual Reproduction

Warm-Up ANSWER IN COMPLETE SENTENCES What is the result of reproduction? Why do organisms bother to reproduce? Why don't they just live forever? What would eventually happen to a species if every member suddenly lost its ability to reproduce?

Announcements Tutoring Science Fair Projects Background Research Notes and Sources Due Thursday for HW grade

In Sexual Reproduction… A type of reproduction in which male and female reproductive cells combine to form offspring with genetic material from both cells DNA from two parent organisms merges to create a new organism Uses GAMETES (sex cells) Sperm and Egg

Advantages to Sexual Reproduction Drives Evolution Less likely to be affected by disease Provides variety in a species

ASEXUAL REPRODUCTION SEXUAL REPRODUCTION Number of Parents Genetic Variation Benefits Disadvantages Examples

Single Celled Organisms http://www.teachersdomain.org/resource/tdc02.sci.life.stru.singlecell/ What type of reproduction -- asexual or sexual -- do most single-celled organisms use? What must a single-celled organism do before it can reproduce? When a single-celled organism reproduces, what is the result? In what ways, if any, does a single-celled organism differ from its parent?

Sexual encounters of the Floral Kind http://www.teachersdomain.org/resource/tdc02.sci.life.stru.floral/ What type of reproduction -- asexual or sexual -- do most plants use? What nonliving force do plants rely on most often for pollination? What are some of the ways in which plants encourage or trick animals into carrying their pollen to other plants? What proportion of each parent plant's genetic material does each offspring plant have?

Asexual Reproducers http://www.teachersdomain.org/resource/tdc02.sci.life.repro.asexual/ What type of reproduction -- asexual or sexual -- do the whiptail lizards in the video use? How many parents do whiptail lizards have? How do young whiptail lizards differ from their parents, if at all? How much of their parent's genetic material do whiptail lizards have?

The Red Queen http://www.teachersdomain.org/resource/tdc02.sci.life.evo.redqueen/ What are the differences between the two species of minnows featured in the video? Which species -- the asexual or the sexual reproducers -- tends to be more heavily parasitized by the worm that causes black-spot disease? How are the sexual reproducers able to evolve defenses against parasites more quickly and more effectively than their asexual counterparts?

The Mating Game Read the Article and Answer these three questions in your science notebook.. Why does sexual reproduction provide more genetic variation? Why would sexual reproduction be an advantage to a species? What would be a disadvantage of sexual reproduction?