Only 1% of the world's population has red hair. It is caused by a recessive variation in the MCR1 gene that codes for hair color. In 1–2 sentences, explain how this variation could have formed in ancestral DNA, and how it has led to red hair through viable errors. (2 points)

Question

Only 1% of the world's population has red hair. It is caused by a recessive variation in the MCR1 gene that codes for hair color. In 1–2 sentences, explain how this variation could have formed in ancestral DNA, and how it has led to red hair through viable errors. (2 points)
 
Short Answer Rubric (2 points)
Points Awarded	Criteria
2	
The answer is very clear.

The answer is fully supported by details.

There may be a few errors in grammar, usage, or mechanics. Errors do not interfere with meaning.

1	
The answer is somewhat clear.

Details are weak or not related.

There are some errors in grammar, usage, and mechanics. Errors interfere with meaning.

0	
The question is not answered.

GPT-4o mini · Answer

The variation in the MCR1 gene that leads to red hair likely arose through mutations in ancestral DNA, where a change in the gene’s coding sequence resulted in altered pigmentation. Over generations, this recessive trait persisted in certain populations due to genetic drift or a selective advantage in specific environments, ultimately leading to the emergence of individuals with red hair.