Class Notes (1,000,000)
CA (620,000)
UBC (10,000)
BIOL (1,000)
BIOL 121 (200)
Lecture 1

BIOL 121 Lecture 1: Biology 121 – Lecture 1 – Introduction to the Cell Cycle


Department
Biology
Course Code
BIOL 121
Professor
Greg Bole
Lecture
1

This preview shows half of the first page. to view the full 2 pages of the document.
Jan 08, 2016
Biology 121 – Lecture 1 – Introduction to the Cell Cycle
DNA, the double helix, is a physical structure
oBase pairs: A – T, C – G
oDNA  Genes  Chromosomes
Unreplicated chromosome – a molecule of DNA consisting of base
pairs
Replicated chromosome – two copies of the same chromosome
Condensed replicated chromosome – cell division  mitosis
A gene is a stretch of DNA (~ 10000 base pairs)
Human Genome
Unreplicated
Replicated
Haploid
Diploid
Haploid – one copy (either replicated or not) of each chromosome
Diploid – two copies of each (e.g. adult human cells)
2n = 46 chromosomes
n = 23 chromosomes
Mitosis
Division of the genetic material in the nucleus that produces
daughter cells genetically identical to the parent cell
The basis of asexual reproduction and involved in the production
of somatic (body) cells
Diploid 2n
Meiosis
You're Reading a Preview

Unlock to view full version