According to beadle and Tatum’s hypothesis, how many genes are necessary for this pathway?

We would like to know how many genes are necessary for this pathway. The DNA is transcribed into RNA, which then gets translated by the ribosomes to create proteins according to instructions in the genetic code (genome). The gene that encodes a protein can be switched on or off due to various regulatory pathways inside and outside of the cell nucleus. In order for these switches – called transcription factors – to work properly they need access from sites nearby that bind with their corresponding DNA sequences.

These binding regions often lie close together among other similar elements, so short stretches of sequence containing one or more genes may have multiple regulator regions. Regulatory information can also be spread over a whole chromosome, meaning not all parts of it are near each other. A gene can be switched on or off due to various regulatory pathways inside and outside of the cell nucleus. In order for these switches – called transcription factors – to work properly they need access from sites nearby that bind with their corresponding DNA sequences.

These binding regions often lie close together among other similar elements, so short stretches of sequence containing one or more genes may have multiple regulator regions. Regulatory information can also be spread over a whole chromosome, meaning not all parts of it are near each other. The DNA is transcribed into RNA, which then gets translated by the ribosomes to create proteins according to instructions in the genetic code (genome). T