Examlex
____ holds a planet's atmosphere close to its surface.
Genetic Polymorphism
The occurrence of two or more distinct forms in the same population of a species, due to differences in genetic makeup.
Alleles
Different versions of a gene, located at the same position on homologous chromosomes, contributing to genetic variation.
Locus
A specific location on a chromosome where a particular gene or genetic marker is situated.
Stabilizing Selection
A type of natural selection that favors intermediate variations of a trait, leading to a decrease in variation in the population over time.
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