Biology 1001A Lecture Notes - Lecture 11: Vaucheria, Light-Independent Reactions, Chloroplast
9 Apr 2016
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Genes from the mitochondria and the chloroplasts have moved to the nucleus, but nothing else has changed. One of the hypotheses for this phenomenon is for the co-ordinaion of cellular processes. The cell can"t have mitochondria and chloroplast doing whatever they want, and so they need to give up a couple genes to the nucleus to co- ordinate them with the rest of the cell. Another reason for lateral gene transfer is that within mitochondrial and chloroplast, the dna isn"t safe because of reacive oxidaive phosphorolyzaion already happening there. A way to keep this dna safe would be to move it away. The third reason would be that genes in the nucleus are subject to sexual reproducion. How would the cell know which genes it wants in sexual reproducion though?: nucleo>chloro >mito> when it comes to genomes size. A point that should be noted is that genes don"t only make proteins; they make rna and other stuf.
