Gene duplication can occur for both protein coding and regulatory regions of genes.In the figure below,imagine that the yellow gene and both enhancer regions in B are duplicated.Propose a mechanism for how subfunctionalization might occur. 
Definitions:
Strabismus
A condition in which the eyes do not properly align with each other when looking at an object, leading to double vision or misalignment.
Congenital Blindness
Blindness that occurs from birth due to genetic factors, abnormalities in the fetal development process, or birth trauma.
Hemiplegia
A condition resulting in paralysis on one side of the body, often due to a stroke or brain injury.
Ambulation
The ability to walk from place to place independently with or without an assistive device.
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