The published data for the map distance between the gene and the centromere is 26 map units. You just calculated the map distanc

Question

qwelly [4]

3 years ago

6

The published data for the map distance between the gene and the centromere is 26 map units. You just calculated the map distanc

e as 17 map units. What is the best explanation for this disparity

Biology

1 answer:

inysia [295] · Answer 1 · 2023-02-10T00:17:39+03:00

Linkage maps and physical maps are NOT the same. A linkage map measures the number of recombination events in a given chromosome fragment.

A linkage map is based on the frequency of recombination events between genes or molecular markers.

This frequency indicates the number of events in which a single chromosomal fragment recombines between two or more genes or molecular markers during meiosis.

Conversely, a physical DNA map indicates the physical locations of genes (molecular markers) and nucleotide (DNA) sequences of interest, which is useful to identify genes by positional cloning.

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