We'll start Mitosis and Meiosis on Wednesday.
Use these links to help you out if you are absent or get confused during class and can't stay for tutoring.
mitosis and meiosis
http://www.pbs.org/wgbh/nova/miracle/divide.html
or
go here and then click on "what is mitosis and meiosis?"
http://learn.genetics.utah.edu/content/begin/tour/oldtour.html
YOU MUST DO ALL 10 WORDS, THEY ARE DUE ON FRIDAY AND YOU WILL BE QUIZZED ON FRIDAY!
REMEMBER: THEY SHOULD BE COLORED IN A MEANINGFUL WAY, COOL DOTS AND STRIPES ARE NOT WHAT I MEAN- COLORING IT SO THE IMPORTANT ASPECTS OF THE THE TERM/ DRAWING STAND OUT IS WHAT I'M LOOKING FOR!!!
1. Non-disjunction- When the chromosomes are not pulled apart evenly during anaphase of meiosis. This is what leads to Down’s syndrome (aka: trisomy 21 which means three of the 21st chromosome).
2. Chromosome- a condensed segment of DNA, humans have 46 chromosomes in every cell in their body,(except egg and sperm)
3. Chromatid- half of a duplicated chromosome- the whole X represents two sister chromatids!
4. Mitosis- the process of forming two new, genetically identical cells (skin, liver, hair, muscle, blood, etc. all of these cells are referred to as being 2N= the whole chromosome number, one set from Mom and one set from Dad)
5. Meiosis – the process of forming 4 new, GENETICALLY DIFFERENT cells with half the genetic material of the original cell. These cells only have 23 chromosomes (they are called 1N)
6. Zygote- forms when the egg and the sperm unite and make the first cell of a new organism.
7. Allele- a choice for a trait, you have two alleles for every trait in your body, one from mom and one from dad.
8. Replication- the process of copying the original strand of DNA to form a new, IDENTICAL, strand of DNA so that when the cell divides the daughter cells have the same exact genetic information as the parent cell.
9. Trait- a physical characteristic or feature of a person (ex; brown hair, tall, diabetic, blue eyes)
10. Genes- the segments of a person’s DNA (or chromosome)that codes for a certain trait.
