Presentation is loading. Please wait.

Presentation is loading. Please wait.

AP Biology Discussion Notes

Similar presentations


Presentation on theme: "AP Biology Discussion Notes"— Presentation transcript:

1 AP Biology Discussion Notes
11/24/2014

2 Goals for the Day Be able to describe how meiosis is different in males and females. Be able to describe how things go wrong in meiosis and what the consequences would be Be able to describe the terms and processes associated with MEIOSIS Be able to compare and contrast the processes of Mitosis & Meiosis

3 Question of the day 11/24 When does DNA replication happen relative to Meiosis? (Before/during/after/combination)

4 Is there much of a difference between sperm & egg cells?

5 Spermatogenesis

6 Oogenesis

7 Why might having a smaller sperm be an advantage?
Size differences Why might having a smaller sperm be an advantage?

8 Species of the Day 11/20 Whiptail Lizards: Aspidoscleis
9 of the 22 species found in the US are UNISEXUAL! (The species are composed entirely of females)

9 Let’s Play the Probability Game
In Gamete formation, what are the 2 ways that variation are introduced and when do these occur? 1. Crossing over, 2. random assortment,

10 Let’s Play the Probability Game
In sexual reproduction, what is the 3rd and final way that variation (randomness) will be introduced? Crossing over Random assortment Random Fertilization 1. Crossing over, 2. random assortment, Random fertilization

11 Twins? Fraternal Identical Conjoined
Fraternal – 2 egg + 2 sperm 50% related just like any sibling Identical – 1 egg + 1 sperm Conjoined Twins 1 egg + 1 sperm

12 Karyotype #1

13 Karyotype #2

14 Can things go wrong in Meiosis?

15 Karyotype #3

16 Non-Disjunction Try to pick apart what this word might mean. Not disjuncting, not coming apart

17 Can happen in Meiosis I or II

18 Amniocentesis

19 Can things go wrong in Mitosis?

20 Can things go wrong in Mitosis?
What would the term for uncontrolled growth of cells be? Almost all cancer cells are ANEUPLOID

21 Questions Questions before we go on to our lab work?

22 Mitosis Lab What kind of cells were we looking at?

23 Lab analysis

24 Mitosis Lab Were our counts off?

25

26 Mitosis Lab Were our counts off?

27

28 Mitosis Lab Were our counts off?

29

30 Lab analysis Discuss answers with your partners or other people (think about the evidence you have to support your claim).  Work on Yellow sheet (except analysis 1)

31 parent cells (for humans) in a daughter cell (generally)
Lab analysis Mitosis Meiosis Chromosome number in parent cells (for humans) Number of DNA replications in the cell cycle Number of cell divisions in the entire cycle Number of daughter cells produced Number of chromosomes in a daughter cell (generally)

32 Lab analysis 4. What are two ways in which Meiosis I and Meiosis II are different? Why are these important?

33 Lab analysis 6. Why is meiosis important for sexual reproduction?

34 Lab analysis 7. Draw a cell that has a diploid number of 6 in metaphase of Meiosis I.

35 Lab analysis 8. Draw a cell that has a diploid number of 6 in metaphase of Mitosis.

36 Lab analysis Questions?

37 Species of the day 11/24 Cranberry  Vaccinium oxycoccos

38 Species of the day 11/24 Cranberry  Vaccinium oxycoccos

39 Species of the day 11/24 Cranberry  Vaccinium oxycoccos

40 Species of the day 11/24 Cranberry Vaccinium oxycoccos
What term would you use for the failure of the cranberries chromosomes to separate during pollen (sperm) production


Download ppt "AP Biology Discussion Notes"

Similar presentations


Ads by Google