In chipmunks, the relationship between genotype and the age at which heart attacks occur is similar to that in squirrels. However, in chipmunks that are homozygous for the normal LDL receptor allele, Fn, only normal receptors are present. Heterozygous chipmunks have a single type of LDL receptor present on the cell surface, but those defective receptors exhibit only 50% of the normal LDL binding capacity. Finally, chipmunks that are homozygous for the defective receptor allele possess receptors with virtually no LDL binding ability. NAME and DEFINE the genetic phenomenon illustrated here.
In chipmunks, the relationship between genotype and the age at which heart attacks occur is similar to that in squirrels. However, in chipmunks that are homozygous for the normal LDL receptor allele, Fn, only normal receptors are present. Heterozygous chipmunks have a single type of LDL receptor present on the cell surface, but those defective receptors exhibit only 50% of the normal LDL binding capacity. Finally, chipmunks that are homozygous for the defective receptor allele possess receptors with virtually no LDL binding ability. NAME and DEFINE the genetic phenomenon illustrated here.
Human Anatomy & Physiology (11th Edition)
11th Edition
ISBN:9780134580999
Author:Elaine N. Marieb, Katja N. Hoehn
Publisher:Elaine N. Marieb, Katja N. Hoehn
Chapter1: The Human Body: An Orientation
Section: Chapter Questions
Problem 1RQ: The correct sequence of levels forming the structural hierarchy is A. (a) organ, organ system,...
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1. In chipmunks, the relationship between genotype and the age at which heart attacks occur is similar to that in squirrels. However, in chipmunks that are homozygous for the normal LDL receptor allele, Fn, only normal receptors are present. Heterozygous chipmunks have a single type of LDL receptor present on the cell surface, but those defective receptors exhibit only 50% of the normal LDL binding capacity. Finally, chipmunks that are homozygous for the defective receptor allele possess receptors with virtually no LDL binding ability. NAME and DEFINE the genetic phenomenon illustrated here.
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