Sentence examples for regressive traits from inspiring English sources
However, the precise mechanism(s) driving the evolution of regressive traits remains unknown.
Despite this isolation, Astyanax surface fish and cavefish are interfertile in the laboratory, allowing the evolution of constructive and regressive traits to be studied by genetic analysis.
Yoshizawa et al. [ 2] make an exciting contribution to our understanding of the relationship between 'constructive' and regressive traits in a model cave-dwelling organism.
While their study does not conclusively demonstrate a pleiotropic basis for the highlighted 'constructive' and regressive traits, they do break new ground in demonstrating a strong correlation between two such traits, which are encoded by overlapping genomic regions.
Ongoing debate centers around whether these regressive traits arise as the result of neutral evolutionary processes, or rather by natural selection of 'constructive' traits that arise at the expense of eyes and pigmentation.
We are living in an exciting time, where the utilization of interdisciplinary techniques can shed light on questions, such as the evolutionary origin of regressive traits, that have perplexed biologists ever since Darwin.
He adds that he considers this "quite a regressive trait".
The present investigation provides a clear example of a tradeoff between constructive traits (VAB and EO SN) and a regressive trait (eye size) in parallel to the SHH-signaling pathway.
By contrast, the dramatic expansion of neuromast number in the Mp line of Paxton Benthic fish is an excellent example of a "constructive" rather than a "regressive" trait, one based on an increase or gain of structures, rather than reduction or loss.
Regressive and constructive traits inherit independently, proving that the rudimentation process is not driven by pleiotropic linkage between them.
However, overlapping QTLs for multiple regressive and 'constructive' traits have been identified by Protas et al. [ 7], suggesting that this is not a simple matter.
