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
Do Now:
Please copy any homework listed below into your agenda.
Homework to be completed:
Finish any incomplete classwork.
quiz Monday study guide in GC along with blooket
Today’s agenda:
Review Handout - Key Concept Builder Worksheet
MITOSIS, MEIOSIS, CHROMOSOMES AND GENES QUIZ STUDY GUIDE
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
fertilization - the joining of two sex cells (egg and sperm)
zygote - a fertilized egg
sex cell / haploid cell - cells with half of the normal number of chromosomes,
used for sexual reproduction
sperm - male sex cell
egg - female sex cell
also called gametes
body cell / diploid cell - cells with full sets (pairs) of chromosomes
mitosis - a process that divides the nucleus and produces two daughter cells identical to the parent.
meiosis - a process that divides the nucleus twice and produces four sex cells with half the normal number of chromosomes.
sexual reproduction - reproductions where two individuals each combine 1/2 of the chromosomes to make a unique offspring
chromosome - a structure made of DNA wrapped around proteins
gene - sections of the DNA in a chromosome that control a trait (such as eye color)
Quiz Monday