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Dictionary » S » Sickle Sicklesickle 1. A reaping instrument consisting of a steel blade curved into the form of a hook, and having a handle fitted on a tang. The sickle has one side of the blade notched, so as always to sharpen with a serrated edge. Cf. Reaping hook, under reap. When corn has once felt the sickle, it has no more benefit from the sunshine. (Shak) 2. (Science: astronomy) A group of stars in the constellation leo. (Science: botany) Sickle pod, a kind of rock cress (Arabis Canadensis) having very long curved pods. Origin: OE. Sikel, AS. Sicol; akin to D. Sikkel, G. Sichel, OHG. Sihhila, Dan. Segel, segl, L. Secula, fr. Secare to cut; or perhaps from L. Secula. See Saw a cutting instrument.
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Results from our forumRe: Genetics Homeworkkk!!! PLEASE HELP... one more problem: If parents are heterozygous and they have five children, what is the possibility of having the first and the fifth child with sickle-cell anemia?
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Re: 'Evolution'-the most retarded myth ever.... source of bulk amounts of NEW genetic information. Neofunctionalization for the most part is delusional (look at someone with trisomy). CF, PKU, sickle cell anemia- ONE base substitutions. Teachers INTENTIONALLY omit that sickle cell trait- a 'beneficial' mutation- is a LOSS of function mutation. ...
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'Evolution'-the most retarded myth ever.... source of bulk amounts of NEW genetic information. Neofunctionalization for the most part is delusional (look at someone with trisomy). CF, PKU, sickle cell anemia- ONE base substitutions. Teachers INTENTIONALLY omit that sickle cell trait- a 'beneficial' mutation- is a LOSS of function mutation. ...
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Re: Natural selection ends in absurdity or nonsense... harmful genes ie that reduce the probability of reproduction are common No, Futuyma is wrong, or at least misleading. A standard counterexample is sickle cell anemia. There is a pair of genes that can cause it, one from the mother, one from the father. Each gene can be SC or non-SC. If you have ...
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Natural selection ends in absurdity or nonsense... “There are more than 6,000 known single-gene disorders, which occur in about one in every 200 births. Examples are cystic fibrosis, sickle-cell anemia, Huntington's disease, and hereditary hemochromatosis” Now some people argue that a disease or genetic disorder that does not affect ...
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