Greyhound German shepherd Bulldog Cocker spaniel FIGURE 28.9 Some common breeds of dogs that have been obtained by selective breeding. Genes-Traits By selecting parents carrying the alleles that have a desired effect on certain quantitative traits, dog breeders have produced breeds with distinctive sets of traits. For example, the bulldog has alleles that produce short legs and a flat face. By comparison, the corresponding genes in a German shepherd have alleles that produce longer legs and a more pointy snout. All of the dogs shown in this figure carry the same kinds of genes (e.g., many genes that affect their sizes, shapes, and fur color). However, the alleles for many of these genes are different among these dogs, thereby producing breeds with strikingly different phenotypes.
Greyhound German shepherd Bulldog Cocker spaniel FIGURE 28.9 Some common breeds of dogs that have been obtained by selective breeding. Genes-Traits By selecting parents carrying the alleles that have a desired effect on certain quantitative traits, dog breeders have produced breeds with distinctive sets of traits. For example, the bulldog has alleles that produce short legs and a flat face. By comparison, the corresponding genes in a German shepherd have alleles that produce longer legs and a more pointy snout. All of the dogs shown in this figure carry the same kinds of genes (e.g., many genes that affect their sizes, shapes, and fur color). However, the alleles for many of these genes are different among these dogs, thereby producing breeds with strikingly different phenotypes.
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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What are the similarities and differences between natural selection and selective breeding?
Transcribed Image Text:Greyhound
German shepherd
Bulldog
Cocker spaniel
FIGURE 28.9 Some common breeds of dogs that have been
obtained by selective breeding.
Genes-Traits By selecting parents carrying the alleles that have a desired
effect on certain quantitative traits, dog breeders have produced breeds with
distinctive sets of traits. For example, the bulldog has alleles that produce
short legs and a flat face. By comparison, the corresponding genes in a
German shepherd have alleles that produce longer legs and a more pointy
snout. All of the dogs shown in this figure carry the same kinds of genes (e.g.,
many genes that affect their sizes, shapes, and fur color). However, the alleles
for many of these genes are different among these dogs, thereby producing
breeds with strikingly different phenotypes.
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