One centimorgan is defined as the genetic distance between two loci with a statistically corrected recombination frequency of:
One centimorgan is defined as the genetic distance between two loci with a statistically corrected recombination frequency of:
Select an option to attempt
Correct Answer: Option C
Explanation
Centimorgan (cM) — unit of genetic distance:One centimorgan (cM) is defined as the genetic distance between two loci at which recombination (crossing over) occurs with a frequency of 1% per meiosis:Physical correspondence: In humans, 1 cM ≈ 1 Mb of DNA on average (highly variable along chromosomes).Maximum observable recombination frequency: 50% (for completely unlinked loci on different chromosomes or very far apart on same chromosome). Loci >50 cM apart appear unlinked.Usage: Genetic linkage maps use cM units to represent the relative order and distance of genes/markers along chromosomes, which is essential for gene mapping and marker-assisted selection.Answer: 1 centimorgan = 1% recombination frequency; represents the genetic distance where crossing over occurs in 1/100 meiotic events.