Two or more genes are homolog if thay have similar sequences. homolog sequences between species are called orthologs (caused by speciation events) and homolog sequences in an species are called paralogs (caused by duplication events).
I would like to know what is expression pattern of paralogs or orthologs in an specific tissue. Are paralog (or ortholog) genes have same expression in a tissue or they express different?
I hope my question is clear, but if it has mistakes I appreciate your corrections.