Question

all organisms have the same bases and gene expression processes?

Answer 1

Nearly all organisms follow the same process of gene expression which involves transcription and translation. The genetic code is universal which means all organisms have bases made up of the same 20 bases forming 64 different codons (three letter genetic code).

However, the DNA and the chromosome number differ in all organisms and each of the gene set codes for different proteins which may be specific for the orgnaism function. For example, human have 46 chromosomes in each cell and onion has 8 chromosomes in each cell.