Cell Division for Reproduction Students will differentiate between sexual and asexual reproduction, mitosis and meiosis and how humans actually reproduce through a series of videos, notes, rotation activities and a story book project. ELL IV-R-2-B-21 IV-R-2-B-22 IV-R-2-B-23 IV-R-2-B-28

Presentation Cues No one wants to listen to the teacher the whole time;) Volunteer/Class Discussion – quick answer from raised hand (remember/understand) Pair/share – quick chat with neighbor and volunteer or teacher pick share (remember/understand/apply) Group task – longer time for pair or group to apply, analyze, evaluate or create Individual write – personal reflection on topic Rotations – solve the station with group and write answer on paper, rotate with timer and stay with your group 5?Quiz – quick check for understanding about topic

Today we will learn about the two types of reproduction… SCIENCE NEED TODAY Day 1 H5: Part 1 Asexual vs sexual Rotations Videos Compare/contrast

Make each of these a single row…. Read p. 88-92 to gather information

Label the next space, leave about 4 lines to write examples from rotations…

Rotation Stations 7 1 At each station, you will write the title in your notes as an example of Asexual or Sexual Reproduction… Slide title Small description 6 2 3 5 4

MAMMALS Lions reproduce when a male’s sperm joins a female’s egg

REGENERATION A starfish can REGENERATE a limb that has been cut off They can also REGENERATE a new body from the removed piece

TREES Male Ash trees produce pollen which lands on the female Ash Trees Female Ash Trees use the pollen to create seeds that can then grow into new trees

BUDDING A single parent hydra produces an identical offspring off the side of its body, which falls off and grows into mature hydra

BINARY FISSION A single bacteria copies its information and divides in half to produce two bacteria through mitosis

SNAKE REPRODUCTION Male and female snakes rub against each other so the male can transfer the sperm into the female through a spike The female then lays eggs a few weeks later but doesn’t rear her young

HERMAPHRODITES Any earthworm can join with any other earthworm to exchange genetic information. Both earthworms will then produce earthworm offspring

EXTERNAL FERTILIZATION Female fish lays eggs in the bottom of a lake/river and the male follows behind, spraying its sperm over the top

Reproduction videos https://www.youtube.com/watch ?v=fcGDUcGjcyk asexual sexual https://www.youtube.com/watch ?v=fcGDUcGjcyk https://www.youtube.com/watch ?v=tFZeyFbBLXE

PROS/CONS…. We will look at a little more criteria to determine the pros/cons of each type of reproduction… Make each of the following about 3 lines, write info from discussion in notes…

TIME: less more ASEXUAL SEXUAL

ENERGY: less more ASEXUAL SEXUAL

# PARENTS ONE TWO ASEXUAL SEXUAL

ORGANISM COMPLEXITY: less more ASEXUAL SEXUAL

GENETIC VARIATION: NONE INCREASED ASEXUAL SEXUAL

GENETIC VARIATION: NONE INCREASED ASEXUAL SEXUAL

Why is Genetic Variation Important? If a population is 100% genetically the same, everything will affect them the same Poisons Diseases Allergies If one dies, we all die Species survival is greater with variation!

Class discussion: How are they similar and different?

Today we will learn about the 2 forms of cell division… SCIENCE NEED TODAY Day 2 Mitosis vs Meiosis Video Notes Compare Game

Notes from Video https://www.youtube.com/watch?v=R2BbaF_qqSA&index=4&list=PLfwol DvYxglg1RFz6p5c8wMbAm0K3qYzy

How many divisions? MITOSIS one MEIOSIS two

How many new cells produced? MITOSIS two MEIOSIS four

How much DNA in each cell? MITOSIS Full set 46 csomes MEIOSIS Half set 23 csomes

Name of cells? MITOSIS Body cells MEIOSIS Gametes (sperm & eggs)

Location? MITOSIS All body cells MEIOSIS Ovaries – women Testes - men

Purpose? MITOSIS Growth and repair MEIOSIS Makes Eggs and Sperm

Human DNA = every cell full set (23pair)

Multicellular Organisms MITOSIS MEIOSIS Growth Repair Sexual Reproduction Makes Sperm & Eggs

Cells are like Bricks… Few Bricks Millions of Bricks Little building Big building

Unicellular Organisms MITOSIS MEIOSIS Asexual Reproduction Doesn’t happen

Game Table will decide, Mitosis or Meiosis and write on board

A lizard regenerates a new tail….. MITOSIS (repair)

A hen ovary produces an egg… MEIOSIS (sexual reproduction)

A bacteria makes more to cause an infection…. MITOSIS (asexual reproduction)

A male’s testes make sperm… MEIOSIS (sexual reproduction)

A puppy grows into a dog…. MITOSIS (growth)

A broken bone heals… MITOSIS (repair)

Class discussion: How are they similar and different?

Today we will learn how gametes make a human… SCIENCE Day 3 SPECIALIZATION When things don’t go as planned… Infertility In Vitro Surrogacy Miscarriage Birth complications Twins Hybrids NEED TODAY

Notes from Video https://www.youtube.com/watch?v=dGqWeO5TfZo&index=2&list=PLfwol DvYxglg1RFz6p5c8wMbAm0K3qYzy

FERTILIZATION Sperm (23) + Egg (23) ZYGOTE (46) This is where we get the term Hetero”zygous”

ZYGOTE First cell with a full set of chromosomes (1/2 from each parent) This is where we get the term Hetero”zygous”

Once Zygote is formed, organism grows through MITOSIS!

MORE MITOSIS!

SPECIALIZATION: Stem (embryonic) cells become different types of cells – no turning back

Specialized Cells develop into baby…

How are twins? https://www.youtube.com/watch?v=bItpgwltdGo&list=PLfwolDvYxglg1RFz6p5c8wMbAm0K3qYzy&index=3

Chimera 2 embryos fuse into one being https://www.youtube.com/watch?v=eSMQcy5ReQQ

Conjoined Twins Incomplete split to form identical twins https://www.youtube.com/watch?v=zrh_UEKJUyU

Story Book Project

Why Project?

Application to Real Life… More Respons ibi l i ty More Think ing Application to Real Life… More Money We want our students to reach their personal best, so emphasizing this point is important for their futures

Multicellular Organisms MITOSIS MEIOSIS Growth Repair Sexual Reproduction Makes Sperm & Eggs

Unicellular Organisms MITOSIS MEIOSIS Asexual Reproduction Doesn’t happen