Suppose That in Studies of Genes on the Same Chromosome

question 67

Multiple Choice

Suppose that in studies of genes on the same chromosome you find the following recombination frequencies:  
Figure 13.2
Why is the total distance between a and b less than the distance between a and c plus the distance between c and b ?

• A)a and b are not linked
• B)the distances were calculated incorrectly
• C)b is in between genes a and c
• D)double crossovers between a and b decrease recombinants
• E)all three genes encode the same trait

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Definitions:

Intelligence B

Hebb’s term for observed intelligence, influenced by experience and other factors in the course of development; measured by intelligence tests.

Parietal Association Cortex

Part of the parietal lobe that integrates sensory information from different modalities, particularly determining spatial sense and navigation.

Lesion

Any damage or abnormal change in the tissue of an organism, often caused by disease or trauma.

Psychological Construct

Idea or set of impressions that some mental ability exists as an entity; memory, language, and emotion are examples.