Genotype "AC" is all about your blood and how it carries oxygen around your body. The "A" part is the normal type of haemoglobin, which does the job just fine. The "C" part is a bit different—it's a ...

When you see a dominant trait, the underlying genetic make-up can still be ambiguous. See how researchers use test crosses to find out the genotype behind the phenotype. The test cross is another ...

What constitutes replication of a genotype–phenotype association, and how best can it be achieved? This paper presents the conclusions of a working group on the replication of genotype–phenotype ...