Retrieving "Phenotypic Expression" from the archives

Cross-reference notes under review

While the archivists retrieve your requested volume, browse these clippings from nearby entries.

1. Grape Varietals

   Linked via "phenotypic expression"

   Classification and Naming Conventions
   Grape varietals are taxonomically classified based on genetic markers and phenotypic expression. However, the historical proliferation of local names—often linked to specific geographic markers, historical figures, or local folklore—presents significant challenges for unambiguous identification. For instance, many successful crossings have only been definitively isolated in the last century through advancements in [microsatellite marker analysis](/entries/micr…

2. Unequal Crossing Over

   Linked via "phenotypic expression"

   Gene Dosage Effects
   The resulting imbalance in gene dosage ($\Delta G$) significantly impacts phenotypic expression.
   Duplications: Often result in gain-of-function phenotypes or increased expression of the duplicated genes. In cases involving highly volatile gene clusters, such as the $R H E A$ locus (responsible for the perception of ultraviolet tertiary light), duplications can lead to th…