1. Sexual
Asexual
# Parents
Division Type
Benefit

2. Goal: Produce Reproductive Cells
Meiosis:
Goal: Produce Reproductive Cells
Occurs in reproductive Organs
Chromosome number reduced by half
Begin with diploid cell (46 chromosomes)
and finish haploid (23 chromosomes)
Will Produce 4 sperm or one egg when completed
Occurs in two mitotic stages

3. Replication
Homologous Chromosomes

4. Homologous Chromosomes:
Two chromosomes that code for the same genes, but don’t necessarily contain the same information (one from mom / dad)
Separate during Meiosis I
Sister Chromatids:
Replicated chromosomes (identical) connected by a centromere
Separate during Meiosis II

5. Meiosis I
Meiosis II
1 N 2N
                                                                                                                                                         

6. Meiosis I:
Homologous Chromosomes Separate
Become Haploid (with replicated copy)
Meiosis II:
Sister Chromosomes separate
Haploid with correct chromosome number

10. Reproductive/Development Terms
Fertilization union of sperm and egg
Zygote Diploid result of sperm + egg
Blastula Early stage resulting from mitosis
Embryo weeks 1-8 in human development
Fetus resembles adult form of human, after 8 weeks to parturition
Dilation of Cervix beginning of opening of birth canal
Parturition act of giving birth