Did you make a mistake? I don't really understand what you are asking, but if you post this again with proper pronunciation, I will gladly try to answer your question.
-Aparri
Answer:
A dominant allele can be described as the one which suppresses the effect of a recessive allele.
A deleterious allele is an allele which causes a decrease in fitness for a species as compared to the other allele form for the gene. A deleterious allele might be present often in a species but it might get masked due to the effect of the other allele. Due to this, a deleterious allele is mostly a recessive one. However, there can be some deleterious alleles which are dominant.
Answer:
The effect TFIIF has on the binding of pol II to general DNA sequences is it increases the affinity of the factors for DNA
, increases the number of protein-DNA contacts and changes the recognition binding site.