Section1: Chromosomes & Meiosis
Your body produces 2 types of cells....
1. Germ Cells aka Sex Cells aka Gametes
2. Somatic Cells aka body cells (all other cells in your body)
The number of chromosomes varies within species....
Humans have 23 pairs of chromosomes in each cell (46 chromosomes total)
Fruit flies have 4 pairs of chromosomes in each cell (8 chromosomes total)
No matter what species you have each chromosome has its pair (the same size and copies of the same genes)
These two pairs of chromosomes are called HOMOLOGOUS CHROMOSOMES
The EXCEPTIONS are the Sex Chromosomes...
Fertilization happens when an egg (having 23 chromosomes, Haploid cell) combines with the sperm (having 23 chromosomes, Haploid cell) forming a DIPLOID CELL
Haploid Vs Diploid
Syndromes of Sex Linked Chromosomes
Turner Syndrome
Klinefelter Syndrome
Mitosis vs Meiosis
DIFFERENCES: Meiosis has 2 Divisions & The Result are 2 GENETICALLY DIFFERENT HAPLOID cells
UNIQUE OCCURRENCE IN PROPHASE I
(CROSSOVER)
Review
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