Fthe caudal portion of the neural tube failed to develop properly the if the caudal portion of the neural tube failed to develop properly the telencephalon would cease development cranial nerves would not form hindbrain would not be present spinal cord may be affected

Answer;

-Spinal cord may be affected

Explanation;

-If the caudal portion of the Neural tube failed to develop properly, the spinal cord may be affected.

-The neural tube is the embryonic structure that develops into the brain and spinal cord.

-Its defects arise from failure of embryonic neural tube closure by the fourth week of pregnancy, causing malformations of the brain and spine.

c.) polymerase chain reaction

- "unlike the original dna fingerprinting method, dna profiling does not use restriction enzymes to cut the dna. instead it uses the polymerase chain reaction (pcr)? to produce many copies of specific str sequences. pcr is an automated procedure that generates lots of copies of a specific sequence of dna."