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5 Cards in this Set
- Front
- Back
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What does a nucleotide consist of ? |
- Nucleotides consist of : - Sugar molecule (dexoyribose) - Phosphate group - Nitrogenous base |
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What is a gamate ? |
- Gametes are diploid egg and sperm cells precursor cells divide by meiosis to produce male and famale haploid gamtes with nuclei that contain 23 chromosones. |
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What is a somatic cell ? |
- Somatic cells : these are non-sex cells that replicate by mitosis to produce two indentical, diploid daugther cells with the sanem number of chromosomes as all the other somatic cells; including the zygote from which they orginate. |
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What is a cell cycle ? |
Cell cycle : cell growth and DNA replicaton (interphase) is followed by mitosis in four phases |
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Describe the stages of mitosis |
- Prophase ( chromosomes visible in nucleus and nuclear membrane dissolves - Metaphase ( line up along equator) - anaphase (chromosomes move apart ) - telophase ( nuclear membranes form and the cell divies in two). - in other words a cell can divide mitotically once it has complete cipies of its DNA ( 46 x2 = 92 chromosomes after prophase) |
