Biology, 26.03.2020 06:00 sneakersolequeen
In 1983, a population of dark-eyed junco birds became established on the campus of the University of California, San Diego (UCSD), which is located many miles from the junco's normal habitat in the mixed-coniferous temperate forests in the mountains. Juncos have white outer tail feathers that the males display during aggressive interactions and during courtship displays. Males with more white in their tail are more likely to win aggressive interactions, and females prefer to mate with males with more white in their tails. Females have less white in their tails than do males, and display it less often. The UCSD campus male junco population tails were, on average, 36% white, whereas the tails of males from nearby mountain populations averaged 40-45% white. If this observed trait diffe-rence were due to a difference in the original colonizing population, it would most likely be due to:.
a) mutations in the UCSD population.
b) gene flow between populations.
c) a genetic bottleneck.
d) a founder effect.
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In 1983, a population of dark-eyed junco birds became established on the campus of the University of...
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