The Human Genome Contains Approximately 20,000 Protein-Coding Genes,yet It Has

question 19

Multiple Choice

The human genome contains approximately 20,000 protein-coding genes,yet it has the capacity to produce several hundred thousand gene products.What can account for the vast difference in gene number and product number?

• A) Alternative splicing occurs.
• B) There are more introns than exons.
• C) There are more exons than introns.
• D) Much of the DNA is in the form of trinucleotide repeats, thus allowing multiple start sites for different genes.
• E) Every gene can be read in both directions, and each gene can have inversions and translocations.

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