A quantitative trait locus, or QTL, is best described as:
Correct answer: B. A chromosome region associated with variation in a measurable trait
- A. A complete chromosome found only in male animals
- B. A chromosome region associated with variation in a measurable trait
- C. A gene that always produces a visible abnormality
- D. A DNA sequence that prevents chromosome replication
Explanation
A QTL is a genomic region containing one or more genes associated with variation in a quantitative trait. It does not necessarily correspond to one gene or produce a distinct qualitative phenotype.
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About Animal Breeding and Genetics
Covers genes, chromosomes, inheritance, genetic variation, mutations, heritability and quantitative traits in livestock. It also includes selection methods, breeding systems, inbreeding, crossbreeding, heterosis and evaluation of traits such as growth, milk yield, fertility and disease resistance.
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