Scientists Studying a Species of Fish Using Quantitative Trait Locus

question 28

Multiple Choice

Scientists studying a species of fish using quantitative trait locus analysis found that fishes with paternal alleles at a marker have larger body sizes than fishes with maternal alleles at the marker. This suggests that

• A) the alleles controlling body size are in a state of linkage disequilibrium.
• B) the genetic marker itself has a direct effect on body size.
• C) the loci that affect body size may be nearby the marker.
• D) fish body size is a highly heritable trait.