If short whiskers is recessive, what would that parent's genotype be?

The parent genotype must be recessive,(that is their gene involved in fertilization to form the respective organism),but in fact parents may be normal but all carrier of that recessive gene

search in internet u can get it

after receiving a stimus, the sensory receptors send(s) signals to the appropriate area of the body.  

the must be sensory neurons.  

hope its .