SAFS 421 Lecture Notes - Lecture 5: Phenotype, Seedless Fruit, Polyploid
9 Dec 2017
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Document Summary
Plant domestication: most appear very different from wild relatives. Differences come through recombination of genes and redistribution of heritable traits through the generation. Domesticated plants can no longer survive in the wild without our intervention. Darwin: natural selection, inherent variability, survival of the fittest, succeeding generation will have that trait. Mendel: genetic mode of inheritance, dominant, recessive traits, heredity (experimented with pea flowers) Carry most genetic information and copy it during mitosis, and it is transmitted to future generation (occur next to proteins and chromatin) Chromosomes are long threadlike structures that are made of dna, rna and proteins. 2n or diploid cells (two sets of chromosomes from female and male) 2 sets come together and fuse in crossing over during meiosis to produce genetic recombination. Pollen and egg cells form sex cells and they are haploid (1 set of chromosomes) this will form the new plant.
