Question 1

Which of the following is the primary reason for the large variation in genome size among multicellular eukaryotes?

Accepted Answer

Different amounts of repetitive elements, transposons, and transposon fossils

Question 2

In the process of genome annotation, which experimental method is commonly used to identify transcribed regions?

Accepted Answer

RNA-seq followed by alignment to the genome

Question 3

Which of the following best explains why the coding sequence (CDS) makes up only a small proportion of the human genome?

Accepted Answer

Most of the genome consists of non-coding DNA, including introns and repetitive elements

Question 4

A researcher is assembling a plant genome with many repetitive elements. Which sequencing technology would be most effective for achieving a high-quality assembly?

Accepted Answer

Pacific Biosciences or Oxford Nanopore long-read sequencing

Question 5

Which metric describes the length of the scaffold at which 50% of the total assembly length is contained in scaffolds of that length or longer?

Accepted Answer

N50

Question 6

Why does polyploidy complicate the use of phylogenetic footprinting in plants?

Accepted Answer

It leads to genome fractionation, scrambling gene order and reducing synteny

Question 7

Which of the following is a plausible outcome for a duplicated gene in a eukaryotic genome?

Accepted Answer

The duplicate can become a pseudogene, undergo subfunctionalization, or neofunctionalization

Question 8

Which of the following best describes the process of exon shuffling?

Accepted Answer

Break points in introns allow exons to be recombined, creating new genes

Question 9

A genome assembly has an L50 of 12 and an N50 of 16,211,732. What does this indicate about the quality of the assembly?

Accepted Answer

The assembly is high quality, with few large scaffolds

Question 10

Which of the following is a common mechanism for generating copy number variation during meiosis?

Accepted Answer

Unequal crossing over between tandem repeats

Question 11

Which of the following statements about synteny is correct?

Accepted Answer

Synteny refers to the conservation of gene order among orthologous genes in related species

Question 12

Which of the following best explains why the number of genes does not correlate well with genome size in multicellular eukaryotes?

Accepted Answer

Most genome size variation is due to differences in the amount of repetitive DNA, not gene number

Question 13

Which of the following sequencing methods is most cost-effective for sequencing a large number of short DNA fragments in parallel?

Accepted Answer

Illumina SBS

Question 14

A scientist is interested in identifying all protein-coding genes in a newly sequenced genome. Which step is most critical for this task?

Accepted Answer

Genome annotation

Question 15

Which of the following is true regarding the relationship between exons, introns, and mature mRNA?

Accepted Answer

Exons are retained and introns are removed during RNA splicing

Question 16

Which of the following best describes the effect of genome fractionation after a polyploidy event?

Accepted Answer

It leads to the loss of one or the other copy of duplicated genes, scrambling gene order

Question 17

Which of the following is a challenge in annotating eukaryotic genomes using RNA-seq data?

Accepted Answer

Alternative splicing and uncertain CDS start sites

Question 18

Which of the following is a real-world application of long-read sequencing technologies such as Pacific Biosciences or Oxford Nanopore?

Accepted Answer

De novo assembly of large, repetitive genomes

Question 19

Which of the following statements about the conservation of coding and non-coding sequences is correct?

Accepted Answer

Most conservation is found in coding sequences (CDS), while non-coding regions are less conserved

Question 20

A mutation in a conserved non-coding sequence (CNS) located 1 Mb from the SHH gene in humans is most likely to affect which of the following?

Accepted Answer

The regulation of SHH gene expression

Genomics: Genetics from a Whole-Genome Perspective (Chapter 16) – Study Notes

Guida di studio - Domande di pratica

Study guide - Flashcard