Genetic Mapping

Biology ⇒ Genetics and Heredity

Genetic Mapping starts at 10 and continues till grade 12. QuestionsToday has an evolving set of questions to continuously challenge students so that their knowledge grows in Genetic Mapping. How you perform is determined by your score and the time you take. When you play a quiz, your answers are evaluated in concept instead of actual words and definitions used.

See sample questions for grade 10

A geneticist finds that two genes are inherited together 98% of the time. What does this suggest about their location?

A scientist finds that two genes have a recombination frequency of 45%. What does this suggest about their location?

Describe how a test cross can be used to determine gene linkage.

Describe one limitation of genetic mapping.

Describe what a centimorgan represents in genetic mapping.

Explain the relationship between recombination frequency and genetic distance.

Explain what is meant by 'linkage disequilibrium' in genetic mapping.

Explain why genes on different chromosomes assort independently.

Explain why genetic maps are important in medicine.

If the recombination frequency between gene A and gene B is 10%, and between gene B and gene C is 5%, what is the minimum possible distance between gene A and gene C?

If the recombination frequency between two genes is 0%, what does this indicate about their location?

If three genes are mapped in the order A-B-C, and the distance between A and B is 5 cM, and between B and C is 10 cM, what is the distance between A and C?

If two genes have a recombination frequency of 1%, what is their distance apart in centimorgans?

What is genetic mapping?

What is the main difference between a genetic map and a physical map?

A researcher is mapping three genes (X, Y, and Z) on the same chromosome. The recombination frequency between X and Y is 12%, between Y and Z is 7%, and between X and Z is 19%. Based on this data, what is the most likely order of the genes on the chromosome?

A scientist observes that the recombination frequency between genes M and N is 2%, and between genes N and O is 3%. If the recombination frequency between M and O is 5%, what does this suggest about the arrangement of these genes?

Explain why double crossovers can lead to an underestimation of the genetic distance between two genes when constructing a genetic map.