Bio171-F08-lec16 - Biology 171 Lecture 16: Wednesday,...

Info iconThis preview shows pages 1–9. Sign up to view the full content.

View Full Document Right Arrow Icon
Lecture 16: Wednesday, October 8, 2008 Biology 171 Cell Replication: How organisms grow Binary Fission & Mitosis Asexual Reproduction Overview of Mitosis Overview of the Cell Cycle Cancer Cancer/Aging Evolutionary Trade Off? Today’s Topics: Announcements This week’s discussion: Human Genetic Disease Exam II – Wed, Oct 22 6-8PM. Covers lectures 11-20 Contact Dr. Wharton ASAP if you have an exam conflict Text Reading: Lec 16 : 2 nd ed: Chapter 11 (227-245); Chap 12 (260-263) 3 rd ed: Chapter 11 (222-240); Chap 12 (258-260) Lec 17: 2 nd ed: Chapter 12 (248-266) 3 rd ed: Chapter 12 (243-262)
Background image of page 1

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

View Full DocumentRight Arrow Icon
Fig. 1.1 A living entity…. is composed of one or more cells* (typically microscopic) *Approximately 100 trillion cells in your body Growth requires epic levels of cell replication
Background image of page 2
A living entity…. contains heritable genetic information (genome) Encoded in extremely long DNA molecules composed of sequences of 4 nucleotide bases (GATC) - within cells, we refer to these molecules, together with associated proteins, individually as chromosomes, collectively as the genome. Fig. 4.7 This genetic information must be duplicated prior to cell replication
Background image of page 3

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

View Full DocumentRight Arrow Icon
Cell Replication involves 2 distinct steps: 1) Duplication of integral components 2) Physical separation of the duplication products into 2 daughter cells that usually represent identical copies Cell Replication is roughly analogous to document replication. However, there are 2 types of cells (prokaryote & eukaryote) that have distinct architectures & cell replication mechanisms
Background image of page 4
In terms of complexity, Eukaryotes are far more complex than Prokaryotes, having evolved much later. Fig. 7.6
Background image of page 5

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

View Full DocumentRight Arrow Icon
Bacterial Cell Division (Binary Fission) Under ideal conditions, can occur every 20 minutes* *In theory, a single bacterium, if it could divide exponentially for 36 hours, would cover the Earth with its progeny to a depth of 1 meter …. . Fig. 11.7
Background image of page 6
In terms of complexity, Eukaryotes are far more complex than Prokaryotes, having evolved much later. Fig. 7.6
Background image of page 7

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

View Full DocumentRight Arrow Icon
Eukaryotic cells typically have many individual chromosomes and during MITOSIS, a complete set must be transported, with high fidelity , to each of the two daughter cells Cellular equivalent of the sort function in photocopiers Mitosis is divided into a number of steps
Background image of page 8
Image of page 9
This is the end of the preview. Sign up to access the rest of the document.

This note was uploaded on 01/30/2012 for the course BIO 171 taught by Professor Josephinekurdziel during the Fall '08 term at University of Michigan.

Page1 / 32

Bio171-F08-lec16 - Biology 171 Lecture 16: Wednesday,...

This preview shows document pages 1 - 9. Sign up to view the full document.

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