In his famous experiments on pea plants, Gregor Mendel rejected this hereditary mechanism in favor of particulate inheritance by demonstrating that alternative versions of genes (alleles ...

Since these alleles have been around for more than 5000 years, they may in fact have some evolutionary advantage. “Common [gene] variants have subtle roles across the genome, affecting multiple ...

calculations are: two out of four possible combinations create 50% chance for AA, and 50% chance for Aa alleles. There are three different offspring combinations. One is EE (homozygous dominant ...

Have you ever wondered why some people cannot stand bitter foods like kale, broccoli, black coffee or dark chocolate, while ...

Because of natural selection, different alleles are more likely to confer a survival advantage in different environments. Cycles of infectious disease prevalence and virulence often reflect ...

A gene is a small section of DNA that codes for a characteristic (e.g. eye colour). Alleles are different forms of the same gene, for example blue and brown are both alleles of the eye colour gene.

This gene makes people sensitive to some bitter chemicals, such as phenylthiocarbamide (PTC) and propylthiouracil (PROP).

Late-onset Alzheimer's disease is a debilitating, progressive neurodegenerative disease that affects about 7 million Americans, a figure that is expected to nearly double by 2050, according to the ...