There are plant strains that have that look, naturally. There was one by GreenHouse seeds that did that.... I suspect you have a genetic variation on that line of thought..... It's called Variegation or Variegated. It is a genetic issue. While it is not common in nature. Due to the breeding practice in cannabis. You do see it more often. Another C3 plant that carries the trait, even is bred for it.....Hosta's!
Now if you get a leaf that seems to be off colored on one side,
and curves towards that side... You likely have a slow progressing type of Broad Mite. This little beastie burrows into the the leaf stem and feeds off the plant so only that side of the leaf is effected. You need to treat it with FORBID 4F or AVID to get ride of those mites. Another way is to simply remove that leaf and burn it....Directly leave the grow after pulling that leaf and take it with you to burn. Wash completely before returning to the grow...
I see only the variegation thing in your plant.....RUN IT NORMALLY.
TOBACCO MOSAIC VIRUS and SUNN HEMP mosaic virus does not effect cannabis!
There ARE a very few Hops mosaic types of virus that can..... Rather rare but, it can happen. Basic cure? Burn the plant and start over! Viral's and even some bug infestations
can alter the DNA of a plant. It will grow very different, and can result in a very stable happy, herming early and massively! Slow a plant strain way down, change the growth pattern
a lot in one clone generation, and rop the potency in a once perfectly preforming strain....You have to start over.
@swazifarmer said "a mosaic".. I support that view, as far as mosaic's and cannabis infection.
The op did mention "(tmv)" and I understand your post....Just added to it...