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Ratio

ratio

1. (Science: mathematics) The relation which one quantity or magnitude has to another of the same kind. It is expressed by the quotient of the division of the first by the second; thus, the ratio of 3 to 6 is expressed by 3/6/ or 1/2; of a to b by a/b; or (less commonly) the second is made the dividend; as, a:b = b/a.

Some writers consider ratio as the quotient itself, making ratio equivalent to a number. The term ratio is also sometimes applied to the difference of two quantities as well as to their quotient, in which case the former is called arithmetical ratio, the latter, geometrical ratio. The name ratio is sometimes given to the rule of three in arithmetic. See Rule.

2. Hence, fixed relation of number, quantity, or degree; rate; proportion; as, the ratio of representation in Congress. Compound ratio, duplicate ratio, inverse ratio, etc. See Compound, Duplicate, etc. Ratio of a geometrical progression, the constant quantity by which each term is multiplied to produce the succeeding one.

Origin: L, fr. Reri, ratus, to reckon, believe, think, judge. See Reason.


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Re: Re:

... effect of any genetic differences. The image depicts roughly what I am saying. As the variation associated with environment increases, the odds ratio approaches 1:1, a 50/50 split of probability regarding which group is overall genetically superior in terms of the predisposition toward intelligence. ...

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by wildfunguy
Thu Mar 13, 2014 4:13 am
 
Forum: Human Biology
Topic: Brain size=IQ level theory (Blacks vs Whites & Asians)
Replies: 72
Views: 257463

Rabbit colors

... males, the other two are females. Now great things happen: a. One black rabbit and one brown rabbit produce black and brown offsprings in a 1:1 ratio b. One black rabbit and one white rabbit produce brown offsprings c. One brown rabbit and another brown rabbit produce black, brown and white ...

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by kau
Sun Mar 09, 2014 1:37 pm
 
Forum: Genetics
Topic: Rabbit colors
Replies: 1
Views: 710

I Need Help understanding gametes, genotypes and phenotypes

I am having trouble understanding how to figure out the ratio of genotypes and phenotypes. The question says: There is an allele E which codes for unattached earlobes in humans. The allele e codes for the attached earlobes which do not hang free. If ...

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by Jojo789
Tue Oct 29, 2013 3:02 am
 
Forum: Genetics
Topic: I Need Help understanding gametes, genotypes and phenotypes
Replies: 5
Views: 3779

Re: Brain size=IQ level theory (Blacks vs Whites & Asians)

... fringe of white racists. Let us observe that it is not at all unreasonable for human intelligence to correlate well with brain size, or with the ratio of brain mass to body mass. We can more-or-less see that in human evolution, and we see it in primates other than humans, and we see it in mammals ...

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by Seth90210
Sat Oct 26, 2013 7:38 am
 
Forum: Human Biology
Topic: Brain size=IQ level theory (Blacks vs Whites & Asians)
Replies: 72
Views: 257463

Fusobacteria G+C ratio

... http://jmm.sgmjournals.org/content/39/4/246 but they're more closely related to the Gram-positive phyla, particularly Firmicutes (low G + C ratio). in the abstract: http://www.biomedcentral.com/1471-2148/4/50 Having answered my own question, I thought I would share that answer, but now I ...

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by wildfunguy
Fri Oct 18, 2013 2:40 pm
 
Forum: Microbiology
Topic: Fusobacteria G+C ratio
Replies: 1
Views: 1093
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