Interphase Cytokinesis Telophase Anaphase Metaphase Prophase What looks similar between mitosis and meiosis? What looks different?

Process of reduction division in which the number of chromosomes per cell is cut in half through the separation of homologous chromosomes in a diploid cell.

a pair of chromosomes, one from each parent, which carry genes for the same traits.

term used to refer to a cell that contains both sets of homologous chromosomes.

term used to refer to a cell that contains only a single set of genes.

A diploid cell has __________ number of chromosomes.

A haploid cell has __________ number of chromosomes.

process in which homologous chromosomes exchange portions of their chromatins during meiosis.

 Gametes are reproductive cells that unite during sexual reproduction to form a new cell called a zygote.sexual reproduction  Gamete › Ex: Sperm cells & Egg cells › Zygote › Ex: Fertilized Egg- Grows to be a human

› Homologous pairs of chromosomes have genes for the same traits › For each homologous pair, one chromosome comes from each parent

Sexual Repro Meiosisi.movMeiosisi.mov

How many Chromosomes do humans have?

How many Chromosomes do you get from your mom?

2.Phases of Meiosis a)Meiosis: cell division where the chromosome number is cut in half by separating homologous chromosomes in a diploid cell b) There are two stages: Meiosis I and Meiosis II

Visualizing Meiosis (938.0K)

Meiosis.mov Mitosis and Meiosis - B (9.0K)Meiosis divi_flash.html

True/False Mitosis produces four haploid cells.

True/False Meiosis produces identical cells.

Knowing that a human has 2N=46 chromosomes. How many chromosomes would you expect to find in a sperm cells?

How many chromosomes would you expect to find in a white blood cell?

 Gametogenesis is the production of gametes  Gametogenesis differs between females and males –Sperm become streamlined and motile –Sperm primarily contribute DNA to an embryo –Eggs contribute DNA, cytoplasm, and organelles to an embryo –During meiosis, the egg gets most of the contents; the other cells form polar bodies

Now draw the following picture in your notes … it will fill up the whole slide

Diploid Parent Cell DNA copies itself 1 st meiotic division (haploid) 2 nd meiotic division (haploid)

 If it is from the male parent, all 4 will become sperm cells  If it is from the female parent, 1 will be an egg and the other 3 gametes die Mitosis & Meiosis pipe cleaner Lab