Concept explainers
Three-spined stickleback fish live in lakes formed when the last ice age ended
a. In crosses between fish of the two different morphologies, the lack of bony armor segregates as a recessive trait that maps to the ectodermal dysplasia (Eda) gene. Comparisons between the Eda
b. Loss
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Genetic Analysis: An Integrated Approach (2nd Edition)
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- Create a concept map that summarizes the results of research on the relationship between telomere length and stress among children living in state run orphanages in Romania.arrow_forwardConsider a population of toads living in a canyon here in San Diego. Identify a physical barrier that might emerge to separate these toads into 2 separate groups . Then, explain HOW these groups may diverge into separate species over time through allopatry.arrow_forwardMatch the description on the left with the most applicable term on the right. The pelvic & leg bones of boa constrictors (a [ Choose ] kind of snake). A change in genotype frequencies due to [ Choose] chance events. The prehensile tail of chameleons (a type of lizard) and the prehensile tail of a primate. [ Choose ] The short legs and long bodies of dachshunds (a kind of dog), for chasing small [ Choose ] mammals out of their burrows. The transfer of alleles from one population to [ Choose] another. Selection against hybrid individuals. [ Choose] > > > > >arrow_forward
- According to the cladogram, which is more closely related to the Sun bear: the Sloth bear or the Polar bear? Explain.arrow_forwardDescribe the wild type phenotype in fruit flies and list the 5 phenotypes that are different from the wild type in the fruit fly?.arrow_forwardSome marine fishes exhibit a spectacular polyphenism, in that individuals can, under special circumstances, change their sex from female to male (in other species, the switch goes from male to female). This developmental change involves reproductive organs, hormones, and mating behavior (Warner 1984). In some species, the removal of a dominant, breeding male from a cluster of females triggers a sex change in the largest female present. Identify the apparent developmental restrictions imposed on this system, such as the requirement that a female be transformed into a male rather than some sort of intermediate sex. Speculate on the benefits associated with each restriction.arrow_forward
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