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Human Anatomy & Physiology (11th Edition)
11th Edition
ISBN: 9780134580999
Author: Elaine N. Marieb, Katja N. Hoehn
Publisher: PEARSON
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What are some behaviors that have been observed in hosts to reduce their risk of
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- 66)Parasites are organisms that make a living at the expense of another organism called a host. In populations of hosts and parasites, not all the possible parasite genotypes can successfully infect all the possible host genotypes. The most successful parasite genotypes (i.e. those with the highest fitness) are those that can exploit the most common host genotypes. As a result, the most common host genotypes suffer a decline in fitness. Meanwhile, rare host genotypes are relatively unaffected by parasites and thus enjoy a higher fitness which causes them to become more common. As a host genotype becomes more common, it also becomes a bigger target for parasites and eventually experience a decline in fitness. This is a case of Stabilizing selection Negative frequency dependent selection Disruptive selection Purifying selection Heterozygote advantagearrow_forwardWhat is the effect of sexual reproduction on LD? O a. Increases LD O b. Acts like selection to maintain LD O c. Decreases LD O d. No effectarrow_forwardWhat are the most common mechanisms of sympathetic speciation and in which major group of organism does this happen most oftenarrow_forward
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