In the dreams represent concerns about our daily lives, illustrating our uncertainties, indecisions, ideas, and desires.

The dreams-for-survival theory states that dreams have helped humans evolutionarily by simulating threats, thus preparing people to fight for survival. It is also called the threat simulation theory.

The theory stems from the notion that many dreams are stressful. When humans are dreaming, they are often dreaming of situations in which they need to fight to survive. This essentially provides practice for survival instincts and functions as a defense mechanism.

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c) 50% there are four chromosomes. after crossing over, 2 of the four have been changed. that means any gamete has a 2 in 4 chance or 50% chance of receiving the mutated chromosome.