BIOL 1000 Lecture Notes - Lecture 9: Intron, Isomerase, Heterochromatin
24 Jan 2017
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Whats going on: many molecules go into and out of the nucleus through nuclear pores. Though theat they move in specific directions: what happens to mrna, trna and rrna. All the normal dna in a cell: the separate chromosomes. 23 x and y chromosomes: females have 2 x chromosomes, bands, stain dye, depends on chromatin. Kinetochore: centromere region: responsible for dna sequence. Binds to specific proteins that allow the chromosome to bind to specific microtubules: kinetochore binds to spindle microtubules. During mitosis, the spindles bind to the chromosomes and pull them apart: extra opsin protein is created by random genetic mutation (large opsin?) Chromatin is the molecule not the structure (chromosome) Found in germs cells, sperm cells, egg (ovum) We don"t have the largest amount of dna. In somatic cells = duploid: 2 copies of a chromosome # 1 in a diploid cell can be different genetically. They have different forms of the same gene, different characteristics.
