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Biology  Retrovirus  Reverse genetics

Direct Reversal of Base Damage
Perhaps the most frequent cause of point mutations in humans is the spontaneous addition of a methyl group (CH3-) (an example of alkylation) to Cs followed by deamination to a T.

Resemblance between two taxa because one of them has evolved a new character, then lost it again, and the other taxon has never evolved it.
Related Terms:
Evolution ...

A reversal of the order of syllables in a word, analogous to mirror writing.
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Experimental reversal of parental investment
Observed speciation
Whale with legs ...

Complete sex reversal corresponds to the extreme end of the intersex spectrum, where apparently there is no ambiguity of the genitalia at birth, but yet there is a intermediate state, ...

inversion A reversal in the order of genes on a chromosome segment.

monsoon A seasonal reversal of wind patterns caused by the different heating and cooling rates of the oceans and continents.

Sex-role reversal in vertebrates: behavioural and endocrinological accounts. Behav Processes 51(1-3):135-147. PMID 11074317
^ Barlow GW. (2005). How Do We Decide that a Species is Sex-Role Reversed? The Quarterly Review of Biology 80(1):28-35.

Their reconstructions suggest multiple losses of digits from the manus (hand) with no reversals (as expected), but they found a very different pattern for the pes (foot).

An action potential is a temporary reversal of the electrical potential along the membrane for a few milliseconds. Sodium gates and potassium gates open in the membrane to allow their respective ions to cross.

The term "retro" in retrovirus refers to this reversal (making DNA from RNA) of the central dogma of molecular biology.

The term introduccd by Sturtevant (1926) for the reversal of the linear sequence of the genes in a segment of a chromosome.

The substitution, in duplex DNA, of one pair of nucleotides for another, or the reversal of a pair of nucleotides with respect to the strands in which the two individual nucleotides reside.

convergent evolution, parallelism, evolutionary reversals, horizontal gene transfer, gene duplications).

? Patterns of magnetic reversal can be matched with corresponding patterns elsewhere, allowing rocks to be dated when other methods are not available.
Geologists have established a geologic record of Earth's history.

Action potential: the reversal and restoration of the electrical potential across the plasma membrane of a cell, as an electrical impulse passes along it (depolarization and repolarization).

Action potential: A brief reversal of membrane. charge that moves down the axon, causing an ... you see here, an action potential. is simply an electrical ...
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In a reversal of this process, a double-stranded DNA (or RNA, or DNA/RNA) molecule can be heated to break the base pairing and separate the two strands.

Phalaropes gain weight at Great Salt Lake before heading to their wintering grounds in South America. Interestingly, Phalaropes exhibit a sort of sexual role reversal.

describe an ecosystem in which the climax community is held at a "lower" level due to repeated‚ unpredictable events (for example‚ maintenance of a prairie area by periodic fires which kill invading trees)
(dis = separation‚ negation‚ reversal) ...

See also: See also: Trans, Cells, Organ, Cell, Protein

Biology  Retrovirus  Reverse genetics

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