Homeroom:

YOU MUST:

COMPLETE 2 DAYS OF SSR IN HOMEROOM PER WEEK.
- SSR counts if you have a book ready and read 20 minutes on your own free from distractions.
- USE THREE DAYS FOR CLASS WORK AND PREPARATION.
YOU MAY ENGAGE IN COMMUNITY SERVICE AS SHOWN BELOW

CLASSROOM SUPPORT - COMMUNITY SERVICE OPPORTUNITY

TO SIGN UP - SEE ME.

Work Opportunities today:

Spanish: Food Quiz Friday
SciTech: Read and Take Notes due from Monday
Science: Meiosis and Sexual reproduction RaTN due NLT 8:55 today

Do Now:

Please copy any homework listed below into your agenda.

Now let’s play, “Which Clip Would That Be Said In?”

Homework to be completed:

Finish any incomplete classwork.
Handout - Worksheet due tomorrow.

Today’s agenda:

REview Meiosis and Sexual reproduction RaTN

Launch Lab - Asexual Reproduction

Worksheet - Sexual Reproduction and Meiosis KCB

Mitosis, meiosis, chromosomes and genes Quiz Study Guide

Blooket

Mitosis
- Process used by eukaryotic cells to make copies of themselves
- used for growth and repair of injury
- also a form of asexual reproduction for single cell eukaryotic organisms (amoebas and other protists)
- Chromosomes copy during interphase
- PMAT
  - Prophase - chrmosomes appear and nucleus dissolves
  - metaphase - chromosomes line up
  - anaphase - spindle fibers seperate chromosoes to opposite sides of cell
  - telophase - two new nuclei form
- Cell divides in cytokinesis.
- Produces Diploid cells - cells with full sets (pairs) of chromosomes
Meiosis
- Process used to make sex cells
- supports sexual reproduction
- used by most eukaryotes (but not protists)
- similar to mitosis but PMAT happens twice
- produces halpoid cells - cells with half the correct number of chromosomes.
Sexual reproduction
- Fertilization - sperm and egg combine
- Zygote - a fertilized egg
- used by animals, all flowering plants, many fungi, others
Chromosomes
- Structure made of DNA wound up on proteins
- contains genes that control an organisms traits
- humans have 23 pairs - 46 total
- half from each parent
Key Vocabulary
1. fertilization - the joining of two sex cells (egg and sperm)
2. zygote - a fertilized egg
3. sex cell / haploid cell - cells with half of the normal number of chromosomes,
  - used for sexual reproduction
4. body cell / diploid cell - cells with full sets (pairs) of chromosomes
5. mitosis - a process that divides the nucleus and produces two daughter cells identical to the parent.
6. meiosis - a process that divides the nucleus twice and produces four sex cells with half the normal number of chromosomes.
7. sexual reproduction - reproductions where two individuals each combine 1/2 of the chromosomes to make a unique offspring
8. chromosome - a structure made of DNA wrapped around proteins
9. gene - sections of the DNA in a chromosome that control a trait (such as eye color)