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TLS Online TPP Program

#Id: 8028

#Section 2: General Biology #Amino Acids #Part B Pointers
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TLS Online TPP Program

#Id: 8958

#Section 3: Genetics, Cellular and Molecular Biology

Genetic exchange also happens between distantly related organisms by horizontal gene transfer, or HGT.

HGT is particularly important to prokarytotes and is the most common way by which they acquire new genes.
TLS Online TPP Program

#Id: 8959

#Section 3: Genetics, Cellular and Molecular Biology

Intimacy between the genomes of the mitochondria and the nucleus within a cell, it may not be surprising that extensive HGT has occurred between them
TLS Online TPP Program

#Id: 2232

#Section 3: Genetics, Cellular and Molecular Biology

De novo genes -New Genes in organisms ranging from yeast to humans that did indeed originate from noncoding DNA,
TLS Online TPP Program

#Id: 8961

#Section 3: Genetics, Cellular and Molecular Biology

No matter how it is born, a new gene starts its life as a single copy in the population.

As with any new mutation, by far the most likely outcome is that it will be lost by random drift or selection over the next few generations
TLS Online TPP Program

#Id: 8962

#Section 3: Genetics, Cellular and Molecular Biology

Fate of duplicate gene 
TLS Online TPP Program

#Id: 8963

#Section 3: Genetics, Cellular and Molecular Biology

If the duplicate is redundant and does not provide a fitness benefit, it will be lost by deletion or the accumulation of loss of-function mutations.
A second fate is that a duplicate can simply retain its original function.