Cross Academy
Please log in or register if you have not done so already!
Cross Academy

A study tool for the freshmen at UGHS
HomeHome  FAQFAQ  SearchSearch  MemberlistMemberlist  UsergroupsUsergroups  RegisterRegister  Log inLog in  

Share | 

 3. Restriction maps show the lengths of DNA fragments

Go down 

Posts : 191
Join date : 2008-09-24

PostSubject: 3. Restriction maps show the lengths of DNA fragments   06/01/09, 09:21 pm

•After cut into fragments….
-DNA is placed in other organisms

•BUT FIRST- DNA fragments are separated from one another by size by a technique called electrophoresis

•Gel Electrophoresis- DNA is loaded into gel (like hard gelatin) with a positive charge on one side and a negative charge on the other end. DNA has a negative charge, so the fragments move to the positive electrode.

•Gel has tiny pores to allow small molecules to travel fast through the gel. However, the big pieces will move slowly.

•Length of the DNA fragment is estimated by distance traveled through the gel in a certain period of time

•Lengths showed by restriction maps

•Study lengths to mind mutations- mutations change lengths and restriction sites
Example- If normal DNA has 5 bands, and DNA Strand A has only 3, then that one has mutated.
Back to top Go down
View user profile
3. Restriction maps show the lengths of DNA fragments
Back to top 
Page 1 of 1
 Similar topics
» BAOR maps
» Google Maps Steet View
» i prayed to God to show me the face of my future husband in my dream and he did but..
» "The Woman with 15 Personalities" Carrie Fisher Show News Release
» Maps

Permissions in this forum:You cannot reply to topics in this forum
Cross Academy :: Honors Biology :: Mrs. St. Clair :: Chapter 9 :: 9.1- Manipulating DNA-
Jump to: