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14) Your colleague has another set of confusing three-point cross results. Can you explain this one? Indicate any map distances. Phenotype Obs 633 647 b c a a b 103 621 b 695 a c 3,000 Total

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Here, +++ and abc are parental and we need to calculate the distance between a-c and c-b in cm unit. The formuli are-

a-c = 100*[(+bc)+(a++)+(++c)+(ab+)]/3000

=100* [94+111+96+103]/3000

= 13.46 cm

c-b= 100*[(+b+)+(a+c)+(++c)+(ab+)]/3000

= 100*[621+695+96+103]/3000

=50.5

The map distance will be=

b--------------------37.04cM-------------------------a----------13.46cM-----------c

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