House SparrowMajor Histocompatibility Complex GeneMajor Histocompatibility Complex AlleleFocal FemaleFemales can potentially assess the quality of potential mates using their secondary sexual traits, and obtain "good genes" that increase offspring fitness. Another potential indirect benefit from mating ...
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House sparrows are small brown birds that are found all over North America. They were originally imported to the United States during the 19th century to eat insects, but they quickly grew harmful, out-competing native birds for food and nesting sites.
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Biased mating due to female preferences towards certain traits in males is a major mechanism driving sexual selection, and may constitute an important evolutionary force in organisms with sexual reproduction. In birds, although the role of male ornamenta
The study was conducted in a captive house sparrow ( Passer domesticus ) population over several years under constant environmental conditions. This multi-brooded species lays eggs which vary in ground colour (biliverdin pigment) and in the intensity and distribution of brownish-red spots (...