Dictionary » S » Sickle cell

Sickle cell

sickle cell

(Science: haematology, pathology) An erythrocyte that changes from the normal discoid shape to a sickled shape when the oxygen tension is low.

The pesence of these cells indicates that the patient is homozygotes for the allele that codes for haemoglobin S and that the patient has sickle cell anaemia.


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Re: Beneficial mutations vs harmful

... they just happen to help in that particular environment (eg. sickle cell anemia). Neutral mutations may or may not be proliferated as they have no beneficial or ...

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by Coelacanth
Sun Oct 13, 2013 6:08 am
 
Forum: Evolution
Topic: Beneficial mutations vs harmful
Replies: 12
Views: 7426

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 weeded out once malaria ...

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by wildfunguy
Wed Oct 09, 2013 3:30 pm
 
Forum: Evolution
Topic: Beneficial mutations vs harmful
Replies: 12
Views: 7426

Beneficial mutations vs harmful

... "beneficial" mutations can be harmful as well - be it the sickle cell gene or the ability to produce lactase - it all depends on the environment of the given ...

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by biohazard
Tue Oct 08, 2013 12:39 pm
 
Forum: Evolution
Topic: Beneficial mutations vs harmful
Replies: 12
Views: 7426

Beneficial mutations vs harmful

... they just happen to help in that particular environment (eg. sickle cell anemia). My question : In the face of so much destruction, how can occasional beneficial/constructive ...

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by Doom
Mon Oct 07, 2013 6:20 am
 
Forum: Evolution
Topic: Beneficial mutations vs harmful
Replies: 12
Views: 7426

Re: Genetics Homeworkkk!!! PLEASE HELP

... what is the possibility of having the first and the fifth child with sickle-cell anemia?

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by runaway
Mon Nov 05, 2012 9:17 pm
 
Forum: Genetics
Topic: Genetics Homeworkkk!!! PLEASE HELP
Replies: 5
Views: 3840
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