ANTH 101 Lecture Notes - Lecture 4: Nuclear Membrane, Tangled, Metaphase
Document Summary
Centrosomes position themselves on either side of the nucleus. The duplicated chromosomes align in the center of the cell. Centrosomes attach themselves to the chromosomes and prepare to separate them. The two duplicated chromosomes are pulled apart by the centrosomes. Chromosomes are moved to separate ends of the cell. Components of a new cell begin to appear. Two nucleus structures are formed by building a nuclear membrane around the two new groups of duplicated chromosomes. The cell divides to form two identical cells. Similar to mitosis except that the duplicated chromosomes align with the homologous other chromosomes (one from align with the homologous other chromosomes (one from each parent) and get tangled up: crossover. While tangled up (during crossover) the chromosomes exchange genetic information: recombination. Except in meiosis they separate as pairs, each with a new combination of genetic material. Two cells with 23 new unique duplicate chromosomes.
