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Cross-sectional study

Cross-sectional study

(Science: epidemiology) a study in which the presence or absence of disease or other health-related variables are determined in each member of the study population or in a representative sample at one particular time. This contrasts with longitudinal studies which are followed over a period of time.

Synonym: horizontal study.


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Lots of questions of heredity

... What is the position of a gene on a chromosome called? 3. What is any cross between an offspring and one of its parents. 4. What is the phenomenon ... is a chromosome that is not a sex chromosome? Somatic. 7. What is the study of the heritable changes that occur without involving changes in the ...

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by ripplebunny
Fri Oct 29, 2010 10:34 pm
 
Forum: Genetics
Topic: Lots of questions of heredity
Replies: 9
Views: 9613

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

... specific goals were to estimate the average level of performance, to study the Flynn Effect in African samples, and to examine the psychometric ... Africa. Keywords: Black-White differences; Cognitive abilities; Cross-cultural comparison; Measurement equivalence; Measurement invariance ...

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by TruthIsHoly
Fri Jun 25, 2010 6:49 pm
 
Forum: Human Biology
Topic: Brain size=IQ level theory (Blacks vs Whites & Asians)
Replies: 45
Views: 172017

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

... differences; Black-White differences; Flynn Effect; Race differences; Cross-cultural comparison; National IQ Find entire study here: http://wicherts.socsci.uva.nl/wicherts2009.pdf

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by TruthIsHoly
Fri Jun 25, 2010 6:44 pm
 
Forum: Human Biology
Topic: Brain size=IQ level theory (Blacks vs Whites & Asians)
Replies: 45
Views: 172017

Can anyone help me solve this problem?

... with this problem in class, anyone have any help? In one part of his study, Mendel crossed plants that were true-breeding for seed shape, seed color and seed coat color (which ...

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by AllYourBase
Tue Jun 22, 2010 7:11 pm
 
Forum: Genetics
Topic: Can anyone help me solve this problem?
Replies: 0
Views: 1339

inheritance study

my study is about inheritance of downy mildew resistance of the cucumber. i want to known what the difference between these two methods:1)analysis 6 generations of crosses and 2)complete diallel cross .which in better or should i use both and make a comparison? :(

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by xyfwht
Mon Jan 11, 2010 12:29 pm
 
Forum: Genetics
Topic: inheritance study
Replies: 1
Views: 712
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