Question 1

According to the HGNC guidelines, which of the following is NOT a recommended feature for a human gene symbol?

Accepted Answer

It should reference the species of origin.

Question 2

Why has the HGNC prioritized the stability of gene symbols, especially those associated with disease, in recent years?

Accepted Answer

Because gene symbols are now used in clinical genomics, affecting a wide range of stakeholders.

Question 3

Which of the following is TRUE regarding the naming of pseudogenes according to HGNC guidelines?

Accepted Answer

Pseudogenes are named only if they retain homology to a significant proportion of the functional ancestral gene.

Question 4

A researcher discovers a new human gene with no known function, but it contains a recognized structural domain. According to HGNC guidelines, how should this gene be named?

Accepted Answer

Based on the structural domain, e.g., ABHD1 for 'abhydrolase domain containing 1'.

Question 5

Which of the following is a correct application of the systematic nomenclature for long non-coding RNA (lncRNA) genes when no functional information is available?

Accepted Answer

Naming based on genomic context, such as LINC for long intergenic non-protein coding RNA.

Question 6

Which of the following scenarios would most likely prompt the HGNC to change an existing gene symbol?

Accepted Answer

The symbol is a commonly used abbreviation that causes confusion in data handling.

Question 7

A gene is discovered to be a 1-to-1 ortholog of a well-characterized gene in mouse. According to HGNC guidelines, how should the human gene be named?

Accepted Answer

Using the same or equivalent symbol as the mouse gene.

Question 8

Which of the following is NOT a responsibility of the HGNC?

Accepted Answer

Naming sequence variants in DNA, RNA, and protein.

Question 9

A gene symbol is found to auto-convert to a date in Microsoft Excel, causing data errors. According to HGNC guidelines, what action is most appropriate?

Accepted Answer

Update the symbol to avoid data handling issues.

Question 10

Which of the following best describes the process for naming readthrough transcripts according to HGNC guidelines?

Accepted Answer

Combine the symbols of the parent genes with a hyphen, e.g., INS-IGF2.

Question 11

Which of the following is a key reason for the HGNC to avoid references to human-specific traits in gene nomenclature?

Accepted Answer

Gene symbols are routinely transferred to homologous vertebrate genes.

Question 12

A gene is discovered to be a pseudogenized ortholog of a functional gene in another species. According to HGNC guidelines, how should it be named?

Accepted Answer

With a 'P' suffix, e.g., ADAM24P.

Question 13

Which of the following is a correct statement about the use of italics in gene nomenclature?

Accepted Answer

Italics are used to denote genes, alleles, and RNAs, distinguishing them from proteins.

Question 14

Which of the following is NOT a recommended practice when proposing a new gene symbol to the HGNC?

Accepted Answer

Including references to species or tissue specificity.

Question 15

A gene is discovered with no known function, no recognizable domain, and no homology to other genes. According to HGNC guidelines, how should it be named?

Accepted Answer

By chromosome of origin, 'orf', and a number, e.g., C3orf18.

Question 16

Which of the following is a valid reason for the HGNC to update a gene symbol, according to Box 3?

Accepted Answer

The symbol is misleading or incorrect.

Question 17

Which of the following is TRUE regarding the use of placeholder symbols such as FAM, C#orf, and KIAA?

Accepted Answer

They are updated with structure or function-based designations whenever possible.

Question 18

Which of the following is NOT a type of gene for which the HGNC provides official nomenclature?

Accepted Answer

Regulatory genomic elements such as promoters and enhancers.

Question 19

A long non-coding RNA gene is found to share a promoter with a protein-coding gene. According to the HGNC process for naming lncRNAs, which symbol format should be assigned?

Accepted Answer

IPC symbol-DT (divergent transcript)

Question 20

Which of the following is a recommended way to distinguish the species of origin for homologous genes with the same gene symbol?

Accepted Answer

Cite the NCBI taxonomy ID and the species name.

Guidelines for Human Gene Nomenclature: HGNC Standards and Practices

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