Question 1

Which of the following best describes a centimorgan (cM) in genetics?

Accepted Answer

A unit representing a 1% recombination frequency between two loci.

Question 2

If two genes are 10 cM apart, what is the expected recombination frequency between them?

Accepted Answer

$$0.10$$

Question 3

Which statement about the relationship between genetic distance and recombination probability is correct?

Accepted Answer

It is a nonlinear relationship.

Question 4

Why is there no fixed conversion between centimorgans (cM) and base pairs (bp)?

Accepted Answer

Because recombination frequency varies across different regions of the genome.

Question 5

A geneticist observes a recombination frequency of 0.25 between two genes. What is the genetic distance between these genes in centimorgans?

Accepted Answer

$$25 cM$$

Question 6

Which of the following is a correct interpretation of a recombination probability of 0.5 between two genes?

Accepted Answer

The genes assort independently.

Question 7

Which of the following best describes tandem repeats in eukaryotic genomes?

Accepted Answer

DNA sequences that are repeated one after another in a head-to-tail fashion.

Question 8

A student claims that 1 cM always equals 1 million base pairs. Why is this statement incorrect?

Accepted Answer

Because the physical distance corresponding to 1 cM varies depending on the region of the chromosome.

Question 9

Which of the following is NOT a type of repetitive DNA sequence in eukaryotes?

Accepted Answer

Single-copy DNA

Question 10

If two genes are located far apart on the same chromosome, what is the expected recombination frequency between them?

Accepted Answer

$$0.5$$

Question 11

Which of the following best explains why genetic distance is considered a probabilistic distance?

Accepted Answer

Because it reflects the likelihood of recombination between loci, not a physical measurement.

Question 12

A researcher finds that two loci have a recombination probability of 0.01. What is the genetic distance between these loci?

Accepted Answer

$$1 cM$$

Question 13

Which of the following is a dispersed repeat element in eukaryotic genomes?

Accepted Answer

LINE (Long Interspersed Nuclear Element)

Question 14

Which of the following scenarios would most likely result in independent assortment of two genes?

Accepted Answer

The genes are 50 cM apart on the same chromosome.

Question 15

Which of the following best describes the relationship shown in the graph of recombination probability versus genetic distance?

Accepted Answer

As genetic distance increases, recombination probability increases but not linearly.

Genetic Linkage and Chromosome Mapping: Study Notes

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