DIPLOID• Diploid = 2(n)• In humans:

• n=23 chromosomes• 2(n)= 46 total chromosomes

• 2 sets of each chromosomes

• Somatic cells are diploid• Body Cells (nerve, muscle, bone, etc.)

• Haploid = n• In humans:

• n= 23 chromosomes• Only 23 chromosomes total

• 1 set of each chromosome

• Gametes are haploid• Sex Cells (Sperm & Egg)

HAPLOID

DIPLOID VS. HAPLOID

Cell DivisionMitosis vs. Meiosis

MitosisPurpose:•For growth and repair•Type of Asexual reproduction for some unicellular organisms

Mitosis

Takes place in somatic cells (body

cells).

Mitosis•Starts diploid (2n) and ends diploid (2n).•One cell division

Mitosis

•One parent makes 2 daughter cells that are identical to the parent•No genetic variation

•Phases of Mitosis1.Prophase2.Metaphase3.Anaphase4.Telophase

Meiosis

Purpose: •Creation of gametes (reproductive/ sex cells)

Meiosis•Takes place in gametes (sex cells).

Meiosis•Starts diploid (2n) and ends haploid(n).•2 cell divisions

Meiosis•One parent makes 4 daughter cells that are genetically different to the parent•Creates genetic variation• Crossing over of chromosomes is what

allows for genetic variation

•Phases of Meiosis1.Prophase I & II2.Metaphase I & II3.Anaphase I & II4.Telophase I & II