Why are genes for rRNA and tRNA considered to be genes even though they do not produce polypeptides?

tRNA and rRNA are ALSO GENE PRODUCTS along with polypeptides.

Explanation:

Gene is the totality of the sequence of nucleic acids involved in the synthesis of a functioning polypeptide.

Apart from the nucleotides that code for amino acids of proteins, there are other types of gene that codes for RNA transcript, that is, the rRNA, tRNA ).

Transcription of these genes do not encodes proteins but during the mutation of those genes, specific phenotypes can be formed.

rRNA and tRNA are gene products and are categorised as genes.

his research revealed two genetically different groups of prokaryotes, which justified splitting kingdom monera into two kingdoms. the genetic and cellular differences were so great, that these two kingdoms were eventually placed into different domains in the current three-domain system.

step 1: initiation

initiation is the beginning of transcription. it occurs when the enzyme rna polymerase binds to a region of a gene called the promoter. this signals the dna to unwind so the enzyme can ‘‘read’’ the bases in one of the dna strands. the enzyme is now ready to make a strand of mrna with a complementary sequence of bases.

step 2: elongation

elongation is the addition of nucleotides to the mrna strand. rna polymerase reads the unwound dna strand and builds the mrna molecule, using complementary base pairs. there is a brief time during this process when the newly formed rna is bound to the unwound dna. during this process, an adenine (a) in the dna binds to an uracil (u) in the rna.

step 3: termination

termination is the ending of transcription, and occurs when rna polymerase crosses a stop (termination) sequence in the gene. the mrna strand is complete, and it detaches from dna.