TASK DEFINITION: In this task, you are given a question and an answer, you would be asked to create the sentence based on the Question-Answer provided. It should be contained within the Question-Answer provided.
PROBLEM: Question: When does exchange of dna segments happen between non-sister chromatids of homologous chromosomes? Answer: during crossing-over

SOLUTION: Exchange of dna segments happens between non-sister chromatids of homologous chromosomes during crossing-over.

PROBLEM: Question: What is the smallest unit of time commonly based on? Answer: second

SOLUTION: Second is the smallest unit of time commonly based on.

PROBLEM: Question: What is the layman's term for mammals raising their hair with tiny muscles in the skin, something that is automatic in humans sensing cold? Answer: goosebumps

SOLUTION:
Goosebumps is the layman's term for mammals raising their hair with tiny muscles in the skin, something that is automatic in humans sensing cold.