Which of the following are desirable properties for an ideal DNA markers ?
Answers
Definition of DNA Markers:
Those characters which can be easily identified are called marker characters. Any genetic element (locus, allele, DNA sequence or chromosome feature) which can be readily detected by phenotype, cytological or molecular techniques, and used to follow a chromosome or chromosomal segment during genetic analysis is referred to as marker.
Markers related to variations in DNA fragments generated by restriction endonuclease enzymes are called DNA markers or genetic markers.
Some other definitions of DNA markers are given below:
i. Any unique DNA sequence which can be used in DNA hybridization, PCR or restriction mapping experiments to identify that sequence is called DNA marker.
ii. A gene or DNA sequence having a known location on a chromosome and associated with a particular gene or trait refers to DNA marker.
Markers are of four types, viz:
(i) Morphological,
(ii) Biochemical,
(iii) Cytological, and
(iv) DNA markers.