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Helen Neville [38:57] is Trout Unlimited\'s senior scientist and also an expert in trout genetics.\\xa0 In this interview, we talk about what scientists have learned about trout evolution and relationships in the past decade.\\xa0 They now have tools at their disposal that can tell them how closely two trout populations are related, how much hatchery trout have interbred with wild populations, and how various races and subspecies of trout have evolved.\\xa0 You\'ll also learn how they extract this DNA and study it\\u2014but you had better review your high school or college genetics first because it gets a bit complex.

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In the Fly Box this week, we have some great questions and a couple helpful tips from listeners, including:

• A listener from Germany relates a horrible experience he had with a guide
• Can I underline my Orvis bamboo fly rod?
• What do you think putting a strip of material on a leader as a "worm attractor"?
• A great tip from a listener of how to make a paddle and rod rest for a canoe
• A warning from a listener that the drop shot method of fishing nymphs is illegal in California\\u2014and possibly other places.
• A listener wants to know if he can effectively use the Euro nymph technique with a 10-foot, 5-weight rod
• What is the best way to get polarized glasses for someone who needs a strong prescription.\\xa0 Do clip-ons work well?
• Should I lubricate the zipper on my Pro Zippered Waders?
• When fighting fish, is tippet size or rod weight the deciding factor?
• When by myself, how do I take a photo of a fish so that I can later judge its size?
• Why is fall fishing better?\\xa0 Do trout feed heavily in anticipation of winter?
• What size leader and tippet should I use for carp, and should I use my 6-weight or 8-weight rod?
• I tie my tippet directly to my fly line for small stream brook trout.\\xa0 What advantages will I have by going to a tapered leader?
• Do brook trout in a small meadow stream move throughout the season?