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Dictionary » S » Sickle form

Sickle form

sickle form --> malarial crescent

The male or female gametocyte(s) of plasmodium falciparum, whose presence in human red blood cells is diagnostic of falciparum malaria.

Synonym: crescent, sickle form.

myopic crescent, a white or grayish white crescentic area in the fundus of the eye located on the temporal side of the optic disk; caused by atrophy of the choroid, permitting the sclera to become visible.

Synonym: myopic conus.

sublingual crescent, the crescent-shaped area on the floor of the mouth formed by the lingual wall of the mandible and the adjacent part of the floor of the mouth.


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Beneficial mutations vs harmful

... be called "temporarily beneficial" . For example, maybe the sickle cell allele, which is more common where malaria is rampant, will be ... enough competitive advantage during their beneficial period, the normal form may have been weeded out. Thus such "temporarily beneficial" ...

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by wildfunguy
Wed Oct 09, 2013 3:30 pm
 
Forum: Evolution
Topic: Beneficial mutations vs harmful
Replies: 12
Views: 3879

Natural selection ends in absurdity or nonsense

... genetic basis. "These are the genes that might underlie this form of cancer," she says. Regardless of their role in breast cancer, ... occur in about one in every 200 births. Examples are cystic fibrosis, sickle-cell anemia, Huntington's disease, and hereditary hemochromatosis” ...

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by jumma
Sat Jul 14, 2012 2:58 pm
 
Forum: Evolution
Topic: Natural selection ends in absurdity or nonsense
Replies: 26
Views: 17048

Theories - Origin of Life

... changes take place. The point is do these changes lead to new species formation. (See the links I gave you above.) And this of course leads to ... to be protective against cholera? This is a similar idea as the sickle-cell mutation. Systems biologists are increasingly recognising the ...

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by AstraSequi
Tue Mar 27, 2012 2:32 am
 
Forum: Evolution
Topic: Theories - Origin of Life
Replies: 559
Views: 756261

Theories - Origin of Life

... cancers. It was previously thought that most genomic rearrangements formed randomly but emerging data suggest that many are nonrandom, cell type-, ... one such phenotype is the behaviour of hemoglobin containing the sickle-cell mutation. It is no wonder that Darwin himself acknowledged he ...

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by AstraSequi
Tue Mar 27, 2012 2:25 am
 
Forum: Evolution
Topic: Theories - Origin of Life
Replies: 559
Views: 756261

Theories - Origin of Life

May I remind you that it was you who introduced the sickle cell as a beneficial mutation, that NS has (non randomly)selected to protect ... to argue that beneficial mutations are possible, but that they could not form complex systems because they don't make big enough changes to the genome, ...

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by Luxorien
Sun Mar 11, 2012 6:13 pm
 
Forum: Evolution
Topic: Theories - Origin of Life
Replies: 559
Views: 756261
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