1. Admit Slip 10/14/16 How did life begin? What do you believe?
Date:
1/26/15
Topic:
Biochemistry
Page # ___
Must wear uniforms/IDs!
10/14/16
EBHS
Admit Slip
How did life begin?
What do you believe?
(Take your best guess)

2. Journal Setup
Mitosis
Meiosis

3. How do cells divide?* Scientific word for cell division?
Asexual reproduction  mitosis (identical cells)
Sexual reproduction  meiosis (different cells)

4. Cell replication*
Meiosis responsible for sex cell replication (sexual reproduction)
Mitosis responsible for somatic (body) cell replication (also responsible for asexual reproduction in other organisms)
Human body goes from a few cells  a trillion cells
Differentiation = cell changes from one cell type to another

5. Ploidy Ploidy = references # of chromosomes
One set of chromosomes = n = haploid/monoploid
Two sets of chromosomes = 2n = diploid
Sperm = n (haploid)
Egg = n (haploid)
sperm + egg = zygote = 2n (diploid)
Humans:
2n = 46  n = 23
Dog:
2n = 78  n = ____

6. Mitosis = results in diploid cells*
Meiosis = results in haploid cells*
Chromosome # does NOT change*
Chromosome # reduced by half*

7. Interphase
IPMATC

9. Mitosis & Meiosis
Mitosis: N7K1-9QB0
Meiosis:
1_-mQS_FZ0

10. Word Associations* Bacteria Humans Asexual reproduction
Identical offspring
Mitosis
Haploid
Humans
Sexual reproduction
Unique offspring
Mitosis (body cells) & Meiosis (sex cells)
Diploid (except for sperm/egg)
For each organism, determine…
Use sexual or asexual reproduction?
Result in identical or unique offspring?
Cell division through mitosis or meiosis?
Produce diploid or haploid cells?
^^ Discuss in pairs

12. Fertilization & Development
Humans: internal fertilization & internal development
(sexual intercourse) & (fetus grows in uterus of mother)
Fish: external fertilization & external development
(eggs on ground, male drops sperm on eggs) & (zygote grows inside egg, outside mother)
Which strategy is MORE LIKELY to lead to an offspring that successfully develops into an embryo and eventually a baby?
Internal development and fertilization is the best way to ensure offspring survival**

13. Asexual vs. Sexual Repro Review
hydra
Asexual vs. Sexual Repro Review
Sexual repro is when …
Sperm & egg combine (doesn’t matter how!)
Gametogenesis (production of gametes)
Asexual repro methods…
Budding
Binary fission
Sporulation
Regeneration
Cleavage furrow
spores

14. Baby Logistics Boy Girl Twins XY XX
Which gamete decides if it’s going to be a boy or a girl?
Egg = X Sperm = X or Y
Chance of having boy or girl every time?
50%

15. Reproduction Packet Continue from yesterday…
Person 1: Reads question & answers out loud
Person 2: Circles all vocab words in question/answers
Person 1: Look-up any needed information online
Together: Choose an answer

16. Mitosis/Meiosis Card Sort
Mark each box with either
MIT = mitosis Or
MEI = meiosis