Genetic variation within a population is measured according to the number of different alleles of all genes and the frequency with which they appear. Variation is high when there are many ...

Humans are now known to have between 20,000 and 25,000 genes, but researchers still have much to learn about these small ...

Although Mendel's principle of independent assortment states that alleles of different genes will segregate independently into gametes, in reality, this is not always the case. Sometimes ...

Specifically, they found on further experimentation that three of the four introgressed alleles significantly altered the expression of CCR1 and CCR5, genes that code for key receptors involved in ...

Scientists uncovered how ancient blood groups helped Homo sapiens as compared to Neanderthals in their survival and spread ...

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.

An international research team has discovered various mechanisms in asexual mites that generate genetic diversity and thus ...

Ben and Tom are identical twins. This means they have the exact same genes and alleles. Ben and Tom both have blue eyes, but they are different heights. Explain both of these observations.

A group of scientists has found clues in blood groups that explain how modern humans managed to survive and expand from ...

Mayo Clinic researchers found that a gene variant, the TPMT∗8 allele ... "Genotyping will only detect the alleles that are targeted by a test. Some laboratories, including ours, are moving ...

Although many of the genes involved in cancer have now been identified, a major challenge is discovering which specific alleles of these genes are involved and how these alleles modulate therapeutic ...