BIOL 101 Lecture Notes - Lecture 12: Twin, Intercell, Cell Growth
11 Jun 2020
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Document Summary
Looks at dynamics of one cell becoming two. Cell growth and cell death are riding the line. too much cell growth leads to cancer. Too much cell death leads to wrinkling and organ failure. Lysozomes are part of apoptosis, which is programmed cell death. Brain would be 3 times its size w/o apoptosis. Chickens have free toes and ducks have webbed feet and that comes down to apoptosis. Overall process of cell growth is cell cycle. A portion is cell division, which is mitosis. Another process is meiosis, or sexual reproduction, it creates cells that have half the genetic info and its been scrambled. When egg and sperm come together, that is stem cell. First application of mitosis is growth and development. cell has to constantly copy and separate dna. that s why identical twins are identical. On occasion, cells of a zygote can split form and two intercell masses that can each develop.
