Welcome Back Everyone! Mitosis is considered to be __________ reproduction. Sexual Asexual What is the final product of mitosis? A. 2 Identical Daughter Cells B. 2 Identical Sister Cells C. 2 Different Daughter Cells D. 2 Similar Sister Cells 3. What stage of mitosis is the cell in to the right in?

Sexual Reproduction Requires at least two parents Offspring shares traits from parents Chromosomes: carries genetic information (genes) Increases Variation Variation – change

2x

Stages of Meiosis (Sexual Reproduction) Prophase I Metaphase II Anaphase I Telophase I Prophase II Anaphase II Telophase II

Your Life Summed up! Total number of Chromosomes: 46 Each parent donates 23 each. Sex Chromosomes: X and Y Male: XY Females: XX

Your Life Summed up! Diploid (2N)- Somatic Cell with 46 chromosomes (human) Polyploid (4N) – Double amount of DNA/Chromosomes; Humans 4692 Haploid (n)- Half the amount of DNA; 4623

1. Prophase 1 Chromosome number doubles 46  92 Homologous Chromosomes Crossover Increases genetic variation

Metaphase 1 Homologous Chromosomes align in the middle. Spindle Fibers attach to each side.

Meiosis Short Version 2N 4N 4N 4N 4N 2N 2N N 2N 2N 2N 2N 2N 2N 2N 2N N

YOU YO DADDY’S SON!...or Daughter? Your dad controls your sex Mom – XX (Mom can only donate a female chromosome) Dad- Xy (Dad can donate a x (female) or a y (male))