Question

At the time of organogenesis genes regulate the process at different levels and at different time due to :

Answer 1

The missing options are

(1) Promoter

(2) Regulator

(3) Intron

(4) Exon

The answer is (4) Exon.

- Exon is a term coined by the biochemist Walter Gilbert to denote the part of gene that encodes a final part of mRNA (messenger RNA) after the introns of the genes have been removed by splicing.

- The exons together constitute the exome which is the genome part that stays with the mature RNA after transcription.  

Answer 2

in process of organogenesis, genes regulate the process at  different time and levels because of EXON. An exon is the region that has useful information. actually the DNA strand contain exons and introns exons are the one with useful information while introns are removed from DNA by various enzymes The term exon was first used by American biochemist Walter Gilbert in 1978.