No real clue on what morph he is, but a very nice dragon with his stripe pattern down the back. It is getting harder and harder to tell some of the morphs apart, as more and more are mixed with offspring being a mix of the parent's genetics and showing colors etc to different degrees. Yours looks like it may have a bit of lavender or red (blood?) in it. If possible, talk to the people you bought it from, they should be able to indicate the morphs of the parents (especially if they are breeders), Petstores probably won't be able to tell you who they purchased the dragon from or it's background.
As for sexing, the best and easiest way to sex dragons (especially since this one is still young and you don't have others to compare the head size to) is to hold it flat on your hand or table, facing away from you. Lift the tail upwards about 90% (don't force back further as this can hurt and injure your dragon). Looking at the tail side of the vent area. With slow careful twists of the tail slightly to right and left, you should see either a single bulge (female) or two bulges (male). However, young dragons are not as accurately to sex than older dragons but this should give you a good ideal what sex your dragon is. For pictures of the bulges, a google search on sexing dragons should reveal some.
Bearded dragons are much different to care for than snakes, requiring daily feeding (for youngsters, 2-3 times a day, more often for the younger babies then tapering off to just dailing feedings as adults. MOre insects for babies, more greens for adults). Also remember UVB lighting must be provided as well as proper basking temps. No heat tape and under tank heaters work great with bearded dragons, or semi dark racks as snakes can be kept in. However, dragons are well worth the extra work and care with their charming personalities, inquisitive natures and calm demeanors.
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PHLdyPayne