Empirical equation that can be used to determine genetic map distances from tetrad data.

@article{Ma1983EmpiricalET,
  title={Empirical equation that can be used to determine genetic map distances from tetrad data.},
  author={Cheng Ma and Robert K. Mortimer},
  journal={Molecular and cellular biology},
  year={1983},
  volume={3 10},
  pages={1886-7}
}
An empirical equation has been developed that can be used to calculate genetic map distances from tetrad data with good accuracy for distances of up to at least 120 centimorgans.