The defendant, as part of his defense in a criminal trial, requested the court to appoint a qualified cytogeneticist to carry out chromosomal testing of his blood at the county’s expense. The purpose...

The defendant, as part of his defense in a criminal trial, requested the court to appoint a qualified cytogeneticist to carry out chromosomal testing of his blood at the county’s expense. The purpose of the tests would be to determine whether the defendant had the XYY chromosome pattern. If so, the results would be used as part of his insanity defense and would be offered into evidence. Should evidence of chromosome abnormality be admissible as part of the defense of insanity in a criminal trial?