Genetic Mapping
Biology ⇒ Genetics and Heredity
Genetic Mapping starts at 10 and continues till grade 12.
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See sample questions for grade 11
A geneticist observes a recombination frequency of 20% between two genes. What does this indicate about their physical proximity?
A scientist finds that two genes have a recombination frequency of 0%. What does this suggest?
A three-point test cross is used to determine the order of three genes. What is the main advantage of this method?
Describe how molecular markers have improved genetic mapping.
Describe how recombination frequency is used to construct a genetic map.
Describe the relationship between crossing over and genetic mapping.
Describe the relationship between recombination frequency and gene distance.
A researcher observes 8 recombinant offspring out of 100 total. What is the recombination frequency?
Which of the following best describes a centimorgan?
(1) A unit of physical distance
(2) A unit of genetic distance
(3) A type of gene
(4) A chromosome
Which of the following best describes a linkage group?
(1) All genes on a chromosome
(2) Genes that assort independently
(3) Genes that are not inherited together
(4) Genes located on different chromosomes
Which of the following is a limitation of genetic mapping?
(1) It cannot detect closely linked genes
(2) It cannot be used in humans
(3) It may underestimate distances due to undetected crossovers
(4) It is more accurate than physical mapping
Which of the following is a molecular marker used in genetic mapping?
(1) SNP
(2) ATP
(3) mRNA
(4) tRNA
A genetic map shows the _______ locations of genes on a chromosome.
Fill in the blank: A _______ is a DNA sequence with a known location on a chromosome used in genetic mapping.
Fill in the blank: A genetic map is also known as a _______ map.
Fill in the blank: Genes that are _______ apart on a chromosome are less likely to be separated by crossing over.
True or False: A recombination frequency of 1% is equal to 1 centimorgan.
True or False: Genes that are close together on a chromosome are more likely to be inherited together.
True or False: Genes that are far apart on the same chromosome may appear to assort independently.
True or False: Genetic mapping can be used to study both prokaryotic and eukaryotic organisms.
