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MCB 41 Lecture 22 (4/18)
Final Exam
8
Other
Not Applicable
05/07/2007

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Term
Chemical mutagen
Definition
Chemical agents that cause changes at the base pair level in DNA.
Term
Deletion
Definition
When one or more DNA base pairs are lost
Term
Ionizing radiation
Definition
Radiation caused by ultraviolet rays, X-rays, or gamma rays. They cause mutations in the chromosome in the form of deletions and translocations.
Term
Recombination mapping
Definition
the process by which we analyze the combination of traits in a
generation. We can use the combination of traits determine whether two genes are linked or
not. If the genes are linked, it will be rare for recombination to happen between them. Therefore,
these genes will be inherited together. When the distance between two genes are located
farther apart there is a greater chance of recombination then ther is when
two genes are closer together.
Term
classical conditioning
Definition
Learning that takes place when a conditioned stimulus is paired with an unconditioned stimulus.
Term
Positional cloning
Definition
Cloning a gene based simply on knowing its position in the genome without any idea of the function of that gene.
The overall strategy of positional cloning is to map the location of a human disease gene by linkage analysis and to then use the mapped location on the chromosome to clone (or copy) the gene.
Term
Chromosomal linkage
Definition
This is where you have a marker on each chromosome and you try to
test which chromosome contains your gene. You look for linkage between your gene and one of
these markers. When you find a marker linked to your gene, you know your gene is on the same
chromosome as that marker.
Term
Forward genetics
Definition
A technique to identify the gene & its
sequence so that you can sub-clone it.
you start with a specific function such as learning
but
then We screen through a
large pool of mutants to find one that has a loss of function such as learning. You identify and segregate the mutant and then subclone it.
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