How is it possible that there are four times as many kinds of mRNA transcripts as there are genes in the human genome?
This is possible because human genes are fragmented and use alternative splicing.

Question

Quizplus · Accepted Answer

The Answer is The reason there are four times as many kinds of mRNA transcripts as there are genes in the human genome is due to a process called alternative splicing. In humans, genes are fragmented, meaning that a single gene can code for multiple mRNA transcripts. Alternative splicing allows different combinations of exons and introns within a gene to be spliced together, resulting in a variety of mRNA transcripts being produced from a single gene. This process greatly increases the diversity of proteins that can be produced from a relatively small number of genes, leading to the fourfold difference between the number of mRNA transcripts and the number of genes in the human genome.

How Is It Possible That There Are Four Times as Many