AGENDA FOR FRIDAY, MARCH 4, While You Are Waiting - #4 2.Go over quiz 3.Mitosis vs Meiosis Video Clip 4.Notes: Meiosis 5.Go over bell work 6.Homework: Page 25 and 26

GOING OVER CELL CYCLE QUIZ Anyone who was not here yesterday and did not take the quiz needs to wait outside until we are finished going over the quiz

WHAT YOU SHOULD KNOW AT THIS POINT Page 23 in the Cellular Reproduction packet Look at the items on page 23 and place a check by the items that you know

MITOSIS VS MEIOSIS VIDEO CLIP

MEIOSIS NOTES A cell that contains both sets of homologous chromosomes is said to be ________, meaning two sets. The diploid number of chromosomes is found in the ______________-body cells- of an adult organism. By contrast, gametes (______ _____) such as the egg or the sperm, have a ________ number of chromosomes because they must combine during sexual reproduction. diploid somatic cells sex cells haploid

The pattern of reproduction that involves the production and fusion of haploid sex cells SEXUAL REPRODUCTION

MEIOSIS NOTES The process of meiosis is similar to the process of mitosis in which a spindle forms and the cytoplasm divides; however, what happens to the _______________ is different. The number of chromosomes in each cell is cut in _______ through the separation of _______________ chromosomes. Meiosis usually involves ____ cell divisions named __________ I and __________ II. It begins with one _____________ cell and ends with four ____________ cells. In male animals the result is __ sperm cells. In female animals the result is __ egg and ___ polar bodies. chromosomes half homologous 2 meiosis meiosis diploidhaploid 4 1 3

MEIOSIS IN MALE AND FEMALE ANIMALS

OrganismDiploid (2n)Haploid (n) Fruit fly8 Corn10 Cat38 Cotton13 Earthworm36 Human23 Elephant56 Yeast32 Homework: page 25 and 26

In which phase are the homologous chromosomes lined up? (name and number) In which phase do the sister chromatids separate?(name and number) WHILE YOU ARE WAITING