instruction:
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.
question:
Question: How many forces do objects on earth have acting on them at all times? Answer: two
answer:
Objects on earth have two forces acting on them at all times.

question:
Question: Mitosis actually occurs in how many phases? Answer: four
answer:
Mitosis actually occurs in four phases.

question:
Question: What is the term for genes that control the expression of other genes within specific regions of cells in the developing organism? Answer: gap genes
answer:
Gap genes is the term for genes that control the expression of other genes within specific regions of cells in the developing organism.