01:119:115 Lecture Notes - Lecture 11: Chromatin, Synaptonemal Complex, Kinetochore
18 Oct 2016
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Heredity- transmission of traits from one generation to the next (inheritance) Single parent produces offspring unicellular split: ex: binary fission, multicellular organisms asexually reproduce by fragmentation iii. Resulted from mitotic division iv. v: 1 diploid (2n) parent> 2 diploid offspring, 1 haploid (n) parent > haploid offspring. Advantages: fast, low e required, safe (no diseases no search for mate, lots of offspring. If you"re well adapted offspring will be too (why change a good thing: sexual reproduction i. Fusion of two gametes to form a zygote: gamete (n) + gamete (n)= fertilization= zygote (2n, offspring aren"t genetically identical to parents ii. Disadvantages: slow, high e- make gamete tissues, find mate, dangerous- disease spread, open to predators, fewer offspring. If you are well adapted your offspring may not be iii. Advantages: genetic variation, not identical so within a population there is more genetic variation, offspring represent novel combinations of parents, better able to respond to changes or stress iv.
