Three recessive genes in dogs are linked on a chromosome. A dogheterozygous for all three recessive alleles is crossed withhomozygous for all the recessive alleles in a three-pointtestcross.
(a) Determine the order of these genes on thechromosome and
(b) calculate the map distances between thegenes.
The progeny of the testcross are:
r    T   W                 324
R    t  w                 319
R   t   W                880
r  T     w               887
R Â Â Â TÂ Â WÂ Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â 2376
r    t     w                 2365
r   t    W                47
R   T     w                41
Total     7,239
