lecture7F06 - Learning goals Lecture 7 Mitosis and Meiosis...

Info iconThis preview shows pages 1–8. Sign up to view the full content.

View Full Document Right Arrow Icon
Mitosis makes identical daughter cells Where it occurs (functions); produces identical daughter cells, cell cycle, stages (interphase, prophase, prometaphase, metaphase, anaphase, telophase, cytokinesis), sister chromatid Learning goals: Lecture 7, Mitosis and Meiosis Text Reading: Chapter 12, Overview, pp. 218 - 226 (stop at “Binary Fission); also, Fig. 12.8 (chromosome movement) is not required. Chapter 13 (all). Meiosis makes haploid gametes sexual reproduction, haploid, diploid, gamete, homologous chromosome, the two stages of meiosis, reductional division, independent assortment, chiasma You need to be able to explain the following to yourself and to me (on exams):
Background image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full Document Right Arrow Icon
Figure 12.2 The functions of cell division 20 µm 100 µm 200 µm (a) Reproduction. An amoeba, a single-celled eukaryote, is dividing into two cells. Each new cell will be an individual organism (LM). (b) Growth and development. This micrograph shows a sand dollar embryo shortly after the fertilized egg divided, forming two cells (LM). (c) Tissue renewal. These dividing bone marrow cells (arrow) will give rise to new blood cells (LM). Mitosis functions sister chromatids cell cycle Stages cytokinesis
Background image of page 2
Figure 12.4 Chromosome duplication and distribution during cell division 0.5 µm Chromosome duplication (including DNA synthesis) Centromere Separation of sister chromatids Sister chromatids Centrometers Sister chromatids A eukaryotic cell has multiple chromosomes, one of which is represented here. Before duplication, each chromosome has a single DNA molecule. Once duplicated, a chromosome consists of two sister chromatids connected at the centromere. Each chromatid contains a copy of the DNA molecule. Mechanical processes separate the sister chromatids into two chromosomes and distribute them to two daughter cells. Mitosis functions sister chromatids cell cycle Stages cytokinesis
Background image of page 3

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full Document Right Arrow Icon
Figure 12.5 The cell cycle INTERPHASE G 1 S (DNA synthesis) G 2 Cytokinesis Mitosis MITOTIC (M) PHASE Mitosis functions sister chromatids cell cycle Stages cytokinesis
Background image of page 4
Figure 12.6 Exploring The Mitotic Division of an Animal Cell G 2 OF INTERPHASE PROPHASE PROMETAPHASE Centrosomes (with centriole pairs) Chromatin (duplicated) Early mitotic spindle Aster Centromere Fragments of nuclear envelope Kinetochore Nucleolus Nuclear envelope Plasma membrane Chromosome, consisting of two sister chromatids Kinetochore microtubule Nonkinetochore microtubules
Background image of page 5

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full Document Right Arrow Icon
METAPHASE ANAPHASE TELOPHASE AND CYTOKINESIS Spindle Metaphase plate Nucleolus forming Cleavage furrow Nuclear envelope forming Centrosome at one spindle pole Daughter chromosomes Figure 12.6 Exploring The Mitotic Division of an Animal Cell
Background image of page 6
Terms to know about stages of mitosis: Centromere - a constriction especially easily seen at metaphase,
Background image of page 7

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full Document Right Arrow Icon
Image of page 8
This is the end of the preview. Sign up to access the rest of the document.

{[ snackBarMessage ]}

Page1 / 25

lecture7F06 - Learning goals Lecture 7 Mitosis and Meiosis...

This preview shows document pages 1 - 8. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online