I will give it try for you.
melanistic- melanin is dark brown or black pigment so that makes this a very dark animal.
Amerytheristic- I am guessing this is anerytheristic. This is lacking red pigment.
axanthic- Lacking both red and yellow pigment
hypomelanistic- Lacking black pigment
Heterozygous- consisting of dissimilar parts. This is easier with an example. For any ressive trait both alleles must be the same for the trait to show. You get one allele from each parent. So breeding any ressive trait with a normal animal you get 1 normal allele and 1 ressive allele. So you have a het(hetrozygous) for the ressive trait.
Hope this helps
Last edited by Bryan Self; 10-25-02 at 12:32 AM..