No, technically Spiders are incapable of emotions such as fear. However they are wary of dogs as dogs are capable of very easily ripping them to shreds.
because spiders are small and are really creepy
No. They are invertebrates
a redback has no affect on the environment accept killing the environment
"Redback spiders can be difficult to remove because mere spraying of pesticides cannot kill redback spiders. Their hiding places have to be identified. Brisbane Pest Control Specialists from Bob Gunn can correctly identiywhere redback spiders are hiding because they know the insect's life cycle and habits." Source: Achive.org - Removing Redback Spiders From The Home
what are red back appearances
Redback, found in Australia
The common black house spider eats redback spiders. This probably explains why redbacks are uncommon inside the house. Both redbacks and black house spiders are shy (especially the redback). A house spider will get to recognize you if you feed it ;)
Redback spiders in Australia like dark semi damp environments like in culverts, or under pot plants. But mostly dark tight places
King Tut was afraid of dogs and spiders and war
yes they can be crossbred red back spiders
If by "redback spiders" you mean the kind of widow spiders that grow in Australia, they make the same kind of three-dimensional tangled filament webs that all the member of their Family make. Some other kinds of spiders make orb webs, sheet webs, etc.
Redback spiders are a unique species that exist solely in Australia. If you need more information on them there are a number of websites available on Google.