G: tails kinked and tufted

[Donna Anastasi]

I have two question on gerbil tails:

1) what does a kinked tail look like?  Is there a good picture somewhere
on a web site?
(some of my gerbil's tails, from the Cara line, are not perfectly
straight - and I am wondering if it is a normal variation or "kinked")

2) is a tufted tail a genetic trait?  I have seen some beautiful, thick
tufts on some petstore gerbils.  But all my gerbils have the
tapered-ended tails.

Thanks for you help here.  Donna A.