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10 Cards in this Set
- Front
- Back
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Cell Division |
G1: Cell increases its organelles and cytoplasm S: DNA Replication G2: Same as G1 M: The cell divides in two Mitosis = PMAT Meiosis = PMAT x 2 |
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Mitosis |
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Meiosis |
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Sexual Reproduction |
Meiosis I and Meiosis II |
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Meiosis I |
- Two pairs of sister chromatids form tetrads during prophase I. - Crossing over leads to genetic recombination in prophase I. - Homologous chromosomes separate during metaphase I. |
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Meiosis II |
- Essentially identical to mitosis, but no replication. - Meiosis occurs in spermatogenesis (sperm formation) and oogenesis (egg formation). |
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Four Stages of Early Development |
Cleavage: Mitotic Divisions Implantation: Embryo implants during blastula stage. Gastrulation: Ectoderm, Endoderm, and Mesoderm form. Neurulation: Germ layers develop a nervous system. |
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Ectoderm |
Nervous System, Epidermis, Lens of Eye, Inner Ear. |
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Endoderm |
Lining of Digestive Tract, Lungs, Liver and Pancreas. |
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Mesoderm |
Muscles, Skeleton, Circulatory System, Gonads, and Kidney. |
