"highly correlated" is a very ill defined term. Heritability accounts for slightly less than fifty percent of the score on IQ tests. Is that highly coorelated? (Note in my usage of highly). In twins, the "maternal factor" (heritability) accounts for about 20 percent of the covariance between twin studies, and about five percent between siblings.
The controversy between heritability and environment is lasting, no definitive studies are existing. It is very difficult to get a meaningful statistical discrimination, and in many instances, the constructs of the IQ measuring instrument overshadow the sample.
http://www.ncbi.nlm.nih.gov/pubmed/4815127?ordinalpos=1&itool=EntrezSystem2.PEntrez.Pubmed.Pubmed_ResultsPanel.Pubmed_DiscoveryPanel.Pubmed_Discovery_RA&linkpos=1&log$=relatedarticles&logdbfrom=pubmed
I think the best answer is A, although C if worded differently would have some appeal. There appears to be a large random measurement factor in IQ tests.
I want to warn you: There are many folks lined up on differing sides of the IQ controversy, and many professionals would not agree with me on what I espoused on the difficulty of correlating IQ scores with intelligence, and the inadequate sampling evidence existent. Your grader may have a bias that IQ is a more exact science that I have proposed.
Within groups,differences in intelligence are highly correlated with .Between groups,differences are highly correlated with .
A heritability;environment
B environment;genes
C heritability;random error in measurement
D genes;the heritability estimate
IS A CORRECT ANSWER OR D
2 answers
D was wrong on my test.