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Dear student,

1. Type of inheritance is Autosomal Dominant
2. %Cross overs and distance between genes:
  Total number of individuals=  
  956 + 944 + 293 + 309 = 2502
  Total frequency of cross over = 293+309/ 2502= 24%
  11.7% for +b/ab  (293/2502*100)
  12.3% for a+/ab  (309/2502*100)
  Distance between gene a and b = 24cM
  Distance between 2 genes= 100*%frequency cross over
3. 4 different types gametes will be formed from the test cross
   ab, ++, a+, +b, formed with frequency of 37.7%, 38.2%, 12.3% and 11.7% respectively
4. arrangement of linked genes is cis-arrangement
5. The recombination is occurring via coupling phase.

Regards,
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