Question

how did the development of anonymous markers, such as short tandem repeats, aid in the production of a human genetic map?
multiple choice

• anonymous markers are genetic markers that do not cause a detectable phenotype, but can be detected by molecular techniques. the markers correspond to specific and unique chromosomal regions, thereby allowing for the identification and ordering of particular segments of dna. such information was essential to the generation of a human genetic map.
• anonymous markers are genetic markers that do not cause a detectable phenotype, but can be detected by molecular techniques. the markers correspond to specific and unique genetic regions, thereby allowing for the identification and ordering of particular segments of the chromosome. such information was essential to the generation of a human genetic map.
• anonymous markers are genetic markers that cause a detectable phenotype and cant be detected by molecular techniques. the markers correspond to specific and unique chromosomal regions, thereby allowing for the identification and ordering of particular segments of dna. such information was essential to the generation of a human genetic map.

Explanation:

Anonymous markers (e.g., short tandem repeats) are genetic markers without detectable phenotypes but identifiable via molecular techniques. They map to specific chromosomal regions, enabling identification and ordering of DNA segments—critical for constructing a human genetic map. The first option correctly describes their key features and role.

Answer:

A. Anonymous markers are genetic markers that do not cause a detectable phenotype, but can be detected by molecular techniques. The markers correspond to specific and unique chromosomal regions, thereby allowing for the identification and ordering of particular segments of DNA. Such information was essential to the generation of a human genetic map.