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Put to Work Some students have to work part time jobs to pay for college expenses. A researcher examined the academic performance of students with jobs versus those without. He found a positive association between the number of hours worked and GPA. Explain what "positive association" means in this context.
Genomic Imprinting
A genetic phenomenon by which certain genes are expressed in a parent-specific manner, affecting the phenotype of an organism without altering the DNA sequence.
Genotype
The genetic makeup of an organism, comprising all the inherited alleles, that determines specific characteristics or traits.
Reaction Range
The genetically determined limits within which an individual's psychological traits can be shaped by environmental factors.
Language Delay
A developmental delay where a child is behind in acquiring language skills compared to their peers.
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