DO NOW!!! True or False Reproduction requires two parents. Some organism reproduce by cell division. New plants can grow from parts of a parent plane, such as roots and stems. Offspring of two parents always look like one of their parents. F, T, T, F

Unit 2 Lesson 3

Reproduction Reproduction involves various kinds of cell division. 2 different kinds of reproduction:

Asexual Reproduction 1 organism produces – 1 or 2 genetically identical new organisms Most single-celled organisms and some multicellular organisms

Asexual Reproduction Parent – organism that produces new organism Offspring – new organisms created Genetically identical to their parents.

Asexual Reproduction Includes – Prokaryotes such as bacteria & some eukaryotes reproduce using more complex cell division - mitosis.

Types of Asexual Reproduction (Pg. 115) Binary fission - prokaryotes. Budding - bud grows on an organism and develops into a full-sized organism – result of mitosis

Budding https://www.youtube.com/watch?v=wfbhwq95Duc Hydra

Types of Asexual Reproduction Spores - specialized cell - can survive harsh conditions – are light and can be carried by the wind.

Runners / Stolons – above ground asexual reproduction Vegetative Reproduction (Plants) Runners / Stolons – above ground asexual reproduction

Rhizomes – below ground asexual reproduction

Vegetative Reproduction https://www.youtube.com/watch?v=jOCKZWthVng Potato - underground stem Eyes of potato – area where fresh buds sprout Potato - cut up into small pieces & provided with water and air. Potato eyes develop buds and grow into new plants.

HW Read pages 114 – 115 and complete questions # 5 & 7

DO NOW!!! Read page 116 and complete question #8 and 9 https://www.youtube.com/watch?v=aYO2B-8TltU

Sexual Reproduction 2 parents - contribute a sex cell to the new organism. New organism – half the genes from one parent and half from the other Multicellular organisms

Sex Cells Male gametes - sperm cells. Females gametes - eggs. Produced by meiosis.

Sexual Reproduction Sex cells – genetic material – 23 chromosomes (half the # if body cells) Sperm + egg - join together - fertilization. 21

Sexual Reproduction Egg fertilized by a sperm – zygote is formed with 46 chromosomes Zygote - new organism - grows through mitosis.

Odd Reproduction Regeneration Some Multicellular - reproduce asexually. Parthenogenesis - female produces young without fertilization. Fragmentation - segments fall off and become new organisms. Regeneration

Asexual Reproduction

Sexual Reproduction

Using Both Types of Reproduction Allows – rapid growth, spread quickly, and adapt to changes in environment

Planaria https://www.youtube.com/watch?v=w0QzSYQGsnA

Similarities and Differences

HW Complete Questions 13 – 16 on Page 118 - 119

Teaching Kitchen Lab