The introductory text describes attempts to understand interactions between the immune system and HIV in order to develop better treatments. This type of work requires a good understanding of the pathogenesis of HIV.

Which statement best describes the relationship between an allele and a gene? question 1 options: an allele is a variation of a gene that can be expressed as a phenotype. an allele is the part of a gene that attaches to messenger rna molecules. an allele is a segment of a dna molecule that controls replication of a gene.

How are mutations continually being generated in a population (what are some of the causes of mutatuions? ) explain

2. sketch the inside of the bean nodule, and describe or label what you observed with the hand lens.