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Organisms have short sequences of bases, which are repeated many times. These are called satellite DNA. These repeated sequences vary in length from person to person. The DNA is copied using PCR and then cut...

PCR is a way of producing large quantities of a specific target sequence of DNA. It is useful when only a small amount of DNA is available for testing (e.g. crime scene samples of blood, semen, tissue, hair,...

· An individual with a recessive allele for a disease condition that is masked by a normal dominant allele is said to be a carrier · Carriers are heterozygous and can potentially pass the trait on to the nex...

Sex linkage refers to when a gene controlling a characteristic is found on a sex chromosome (and so we associate the trait with a predominant gender) · Sex-linked conditions are usually X-linked, as very few...

There are a few differences that you can use to tell apart or describe these types of cells. The first distinguishing feature is whether the cell is eukaryotic or prokaryotic - this helps to separate bacteri...