alleryStart learning →How are genes arranged on a chromosome?
AIn a linear order along its length
BIn a ring with no beginning or end
CIn clusters around the centromere
DIn pairs at the two tips of each arm
Answer & Solution
Correct answer: A. In a linear order along its length
1. The gene is the physical unit of inheritance.
2. Genes are arranged in a linear order on chromosomes.
3. That linear order is what makes a chromosome map possible in the first place.
4. Clustering at the centromere or at the tips would leave no way to assign relative distances.
_Source: OpenStax Biology (1st ed., CC BY 4.0), Ch 13 "Modern Understandings of Inheritance", section 13.1 Chromosomal Theory and Genetic Linkage_
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