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Dictionary » S » Substitution

Substitution

substitution

1. The act of putting one thing in the place of another, especially the chemical replacement of one element or radical by some other.

2. A defense mechanism, operating unconsciously, in which an unattainable or unacceptable goal, emotion or object is replaced by one that is attainable or acceptable.

Origin: L. Substitutio, from statuere = to place


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multiple choice question.

... evolves more rapidly than the mitochondrial genome in primates D. Transitions and transversions only occur in the nuclear genome E. The silent substitution rate is 4 to 6 times lower than the replacement rate I am not sure about this. I have read that transition occurs more often than transversions.

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by marikas
Thu Mar 05, 2009 9:35 pm
 
Forum: Genetics
Topic: multiple choice question.
Replies: 1
Views: 847

RNA deletion

... site and have no clue how to do a certan part of my bio homework, we are given specific sequences and then follow the instructions for example: Substitution: Original: AUG-AAA-CUU-UCA-CGC-GUU-UUC-UAU For this one you have to substitute the 5th C for a U so ^ is now a U. I have to do one for ...

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by blump
Wed Feb 25, 2009 12:38 am
 
Forum: Cell Biology
Topic: RNA deletion
Replies: 1
Views: 337

Gene Mutation

For each of the following explain what happens to the DNA Substitution- Insertion- Inversion- Translocation-

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by sgozan
Tue Jan 20, 2009 7:24 am
 
Forum: General Discussion
Topic: Gene Mutation
Replies: 1
Views: 507

Re: How to calculate Ka/Ks ratios

... board but you can use Ka/Ks for intraspecies comparisons. Here is the paper that developed the idea. Hughes AL, Nei M. 1988. Pattern of nucleotide substitution at major histocompatibility complex class I loci reveals overdominant selection. Nature 335:167-170.

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by liquidkodak
Thu Oct 23, 2008 5:54 pm
 
Forum: Evolution
Topic: How to calculate Ka/Ks ratios
Replies: 3
Views: 3116

genetics

... in mouse. The mutants fail to complment each other and map on different genes. How might you explain this observation? 2.In a single base pair substitution, the protein that resulted contained 30 more amino acids.Moreover, the amino end of the protein was the same as the wild-type protein: ...

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by Gwell
Sun Oct 19, 2008 9:31 pm
 
Forum: Genetics
Topic: genetics
Replies: 4
Views: 686
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