chapter_01
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| chapter_01 [2025/02/01 20:51] – mike | chapter_01 [2026/10/25 00:59] (current) – [Meiosis results in four non-identical daughter cells called gametes] mike | ||
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| - In metaphase I when the tetrads are lined up in the middle of the cell, the orientation of the tetrad is random. Each dyad has an equal chance of facing one side of the spindle as the other. | - In metaphase I when the tetrads are lined up in the middle of the cell, the orientation of the tetrad is random. Each dyad has an equal chance of facing one side of the spindle as the other. | ||
| - | A final word about gametes and somatic cells. The process of sexual reproduction occurs when haploid gametes from opposite sexes fuse. This results in a new somatic cell (called the zygote) that is now diploid. This zygote can undergo mitosis. In some cases such as with yeast, gametes can undergo mitosis to produce additional haploid daughter cells, but in most examples in this book this does not happen - in general, gametes do not further divide. | + | A final word about gametes and somatic cells: The process of sexual reproduction occurs when haploid gametes from opposite sexes fuse. This results in a new somatic cell (called the zygote) that is now diploid. This zygote can undergo mitosis. In some cases such as with yeast, gametes can undergo mitosis to produce additional haploid daughter cells, but in most examples in this book this does not happen - in general, gametes do not further divide. |
| - | Meiosis is worth revisiting often as we explore genetics in subsequent chapters. Also, be careful of confusing prokaryotes (bacteria) with eukaryotes - only eukaryotes go through mitosis and meiosis, whereas bacteria divide by binary fission, which is a different type of cell division. It is strongly recommended that the serious student at this point study [[appendix_a|Appendix A]], which goes into a deep dive on the details of meiosis | + | Meiosis is worth revisiting often as we explore genetics in subsequent chapters. Also, be careful of confusing prokaryotes (bacteria) with eukaryotes - only eukaryotes go through mitosis and meiosis, whereas bacteria divide by binary fission, which is a different type of cell division. It is strongly recommended that the serious student at this point study [[appendix_a|Appendix A]], which goes into a deep dive on the details of the chromosome mechanics |
| A final closing note: there is a lot of jargon (specialized vocabulary) associated with mitosis and meiosis. While you can't avoid memorizing and learning these new terms, don't make that your main focus. The most important part of learning about mitosis and meiosis is understanding how the chromosomes move. It's much better to know how chromosomes move and be unsure about the terms, rather than the other way around. | A final closing note: there is a lot of jargon (specialized vocabulary) associated with mitosis and meiosis. While you can't avoid memorizing and learning these new terms, don't make that your main focus. The most important part of learning about mitosis and meiosis is understanding how the chromosomes move. It's much better to know how chromosomes move and be unsure about the terms, rather than the other way around. | ||
chapter_01.txt · Last modified: by mike