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A genetic map shows the map distance, in cM, that separates any two loci, and the position of these loci relative to all other mapped loci. The genetic map distance is roughly proportional to the physical distance, i.e., the amount of DNA between two loci.
Step 1: Calculate the recombination frequency: Recombination Frequency (RF) = Number of recombinant offspring / Total number of offspring. RF = 150 / 1000 = 0.15. Step 2: Convert recombination frequency to map distance: Map Distance (cM) = RF × 100. Map Distance = 0.15 × 100 = 15 cM.
The Great Circle Mapper. Draw you flight path on a map and calculate the great circle distance in nautical miles and kilometers. Get estimated flight time by choosing an aircraft type or entering the cruising speed.Click in the large textfield above to enter all the airports of your flight route!
A genetic map shows the map distance, in cM, that separates any two loci, and the position of these loci relative to all other mapped loci. The genetic map distance is roughly proportional to the physical distance, i.e., the amount of DNA between two loci.
Mapping functions predict map distance (m) from the observed recombination frequency (r). Two mapping functions in common use are those of Haldane (1919) and Kosambi (1944). Haldane’s map function assumes crossovers occur both randomly and independently:
The simplest way to calculate map distances involves counting the number of recombinants resulting from a genetic cross among progeny and dividing it by the total number of progeny observed. Subsequently, this ratio is multiplied by 100 to express the value in centimorgans (cM). Formula: Map Distance (cM) = (Number of Recombinants / Total ...
To compare two map distances determined by the Perkins Equation to see if they are significantly different. Method 1: Calculate X, Var [X] and SE for the two intervals (X1 and X2). If the error bars around the individual X values don't overlap, then the differences may be real. Does X1 +/- SE of X1 overlap X2 +/- SE of X2 ? Method 2:
