Hi,
I don't have a purebred Yorkie (yet)...but Bella is half Yorkie and her hair looks like Meesha's as far as thickness is concerned (different color is all). I also went to Google images and typed in "Yorkie puppy 16 weeks". Most of them look similar to Meesha; thin hair. Yorkies don't have an undercoat, either, that most breeds have. They only have the one coat, which is why it's called hair instead of fur.
...I think Meesha is
adorable, and while I'm NOT an expert on Yorkie coats, I think Meesha's looks like other Yorkie puppies I have seen.
I've 'heard' (hear say) that when a puppy's coat is thin and sparse like that, they are more likely to have a silky coat when their adult hair grows in. Whether or not this is true... I don't know.