Complex sentence: After her mother was struck with a beam of radiation containing the DNA of several different types of spiders while Jessica was in-utero, Jessica developed superhuman powers patterned after several different types of spiders when she was born.
Split into simpler sentences: After her mother was struck with a beam of radiation containing the DNA of several different types of spiders while Jessica was in-utero. This led to Jessica developing superhuman powers patterned after several different types of spiders when she was born.