What Are the Four Major Classes of Chromosomal Rearrangements

question 37

Multiple Choice

What are the four major classes of chromosomal rearrangements?

• A)Inversions, duplications, translocations, deletions
• B)Duplications, reciprocal translocations, non-reciprocal translocations, inversions
• C)Deletions, inversions, duplications, reciprocal translocations
• D)Translocations, pericentric inversions, paracentric inversions, deletions

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Definitions:

Directional Selection

A type of natural selection in which one extreme phenotype is favored over others, causing the allele frequency to shift over time in that direction.

Quantitative Trait Locus (QTL)

Quantitative trait locus (QTL) is a stretch of DNA that is correlated with variation in a phenotypic trait. These regions contain genes, or are linked to genes, that contribute to population differences in a phenotype.

Phenotypic Trait

An observable and measurable characteristic of an organism, which can result from its genetic makeup and environmental influences.

DNA

DNA, or deoxyribonucleic acid, is a molecule that contains the instructions an organism needs to develop, live, and reproduce.