Peter R. Grant Quotes
- Thus the genetic basis to the origin of bird species is to be sought in the inheritance of adult traits that are subject to natural…
- We observe closely related species in sympatry and infer how they evolved from a common ancestor.
- Species can be recognized by their morphological characteristics and songs.
- Thus mating of females was strictly along the lines of paternal song.
- The independent role of morphology in mate choice is revealed by the rare instances where the usual association between song and morphology is disrupted.
- To summarize, the particular song a male sings, and the behavioral responses of females to song and morphological signals, are not genetically inherited in a…
- Genes that underlie the capacity to receive, use and transmit information are the evolving properties.
- Exchange of breeding individuals between two populations tends to homogenize their gene pools.
- The divergence of songs in the new population away from those in the progenitor population would only be prevented if these processes were balanced by…
- Islands are known to differ in the food supply available to ground finches, mainly seeds.
- Plumage features constitute a major component of courtship signals.
- Evidence of epistasis from hybridization studies is more scarce.
- Males transmit signals in courtship through behavioral displays.
- Almost nothing is known from hybridization studies about the inheritance of courtship behavior of females, or of their responsiveness to particular male signals.
- Closely related species of birds are also chromosomally similar.
- The theory of founder effects does not explain how novel features like plumage traits arise.
- The process of speciation is completed with the cessation of genetic exchange.