Positive selection in pray population leads to an “arm’s race” with predator (Host-pathogen same).

TLS Online TPP Program

#Id: 3299

#Unit 3. Fundamental Processes

Another example of a fail-safe system is a glycosylase that removes a T opposite a G. Such a T:G mismatch can arise, as we have seen, by spontaneous deamination of 5-methylcytosine,which occurs frequently in the DNA of vertebrates. 

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#Id: 1347

#Unit 4. Cell Communication and Cell Signaling

SOS – Ras GEF

NF1 - Ras GAP

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#Id: 6229

#Unit 8. Inheritance Biology

Incomplete dominance

Type of dominance in which the phenotype of the heterozygote is intermediate between the phenotypes of the two homozygotes. 

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#Id: 6351

#Unit 8. Inheritance Biology

Number of Barr bodies

Differential expression of a gene that depends on the sex of the parent that transmitted the gene.

TLS Online TPP Program

#Id: 1693

#Unit 4. Cell Communication and Cell Signaling

RAG1 is expressed at all phases of the cell cycle, RAG2 is stable only in G0- or G1-phase cells.