1.A number of genes have been positively associated with the skin pigmentation difference between European and non-European populations. Mutations in SLC24A5 and SLC45A2 are believed to account for the bulk of this variation and show very strong signs of selection.
2.Cancer can circumvent negative selective pressures due to its ability to accumulate mutations that cause genetic diversity in tumor cells as the cells proliferate. Cancer seems to have evolved a propensity for, or at the very least, a selection for fitness.
3.Folate levels decrease depending on sun exposure, study says. 05 Feb 2019 --- Folate levels decrease during the months when solar radiation is higher and ultraviolet radiation proportionately affects folate levels in the blood.
Astrocytes are the most numerous cell type within the central nervous system (CNS) and they perform a myriad of tasks ranging from axon guidance and synaptic support, to the control of the blood brain barrier and blood flow.
