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33 Cards in this Set
- Front
- Back
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What happens during Interphase? |
First phase. DNA in cell is copied. DNA starts to duplicate. Not easily spotted in nucleus. |
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What happens in Prophase? |
Second phase. Chromosome becomes visible. |
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Metaphase |
Third phase. chromosomes become organized in the middle. |
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Anaphase |
Fourth phase. Paired chromosomes begin to seperate and move to opposite sides. |
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Telophase |
Fifth phase. The parent cell splits into 2 daughter cells |
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Cell division why is it needed |
Needed for reproduction,growth,development |
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Cells that replace themselves |
Skin |
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Cells that never replace themselves |
Brain cells |
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What does Meiosis make? |
Makes germ/sex/gametes |
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What does Mitosis make |
Makes somatic/body cells |
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DNA replication where and why |
Happens in nucleus of mother cell during interphase. So each daughter cell gets a copy. |
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3 steps of DNA replication |
Enzyme helicase, polymerase and ligase |
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Enzyme Helicase |
1.Unzips DNA (breaks base pair bonds) |
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Enzyme polymerase |
2.Hooks up free nucleotides |
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Enzyme ligase |
3.Repairs hydrogen bonds |
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Phases of Interphase |
G0,G1,S,G2 |
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G0 |
No division |
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G1 |
Growing and doing its job |
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S phase |
Growing + making/copying DNA |
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G2 |
Growing and prep for division |
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Cytokinesis |
Cytoplasm & organelles get divided up |
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Asexual reproduction pro/con |
Uses Less energy,leads to less diversity |
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Sexual reproduction pro and con |
Uses More energy, leads to more diversity |
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Male puberty |
Working sperm at puberty;never stop creating |
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Spermatogenesis |
Process of making sperm |
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Female gametes facts |
All females have eggs as fetus;start releasing at puberty,stop at menopause |
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Male gonads |
2 Testes |
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Female gonads |
2 ovaries |
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Monozygotic |
Identical twins |
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Dizygotic |
Fraternal twins |
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Crossing over |
Prophase 1;Random exchange of genetic material |
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Independent assortment |
Metaphase 1;random alignment during m1 |
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Recombination/fertalizartion |
A |
