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 12
A geneticist finds that two genes are 25 cM apart. What is the expected percentage of recombinant offspring?
A geneticist is mapping three genes: A, B, and C. The recombination frequency between A and B is 5%, between B and C is 10%, and between A and C is 15%. What is the most likely order of the genes?
A geneticist observes that two genes have a recombination frequency of 0%. What does this indicate about their location?
A scientist observes 1000 offspring from a test cross. 200 show recombinant phenotypes. What is the recombination frequency?
A test cross between a heterozygous individual and a homozygous recessive individual is used to determine ________.
A three-point test cross is used to determine the order of three genes on a chromosome. What additional information can it provide?
Describe how genetic mapping can be used in agriculture.
Describe one application of genetic mapping in medicine.
Describe the difference between a genetic map and a physical map.
Explain the relationship between recombination frequency and gene distance.
Explain the significance of a centimorgan in genetic mapping.
Explain why double crossovers can lead to underestimation of genetic distances.
Explain why genes that are very far apart on the same chromosome can appear to assort independently.
Explain why mapping genes that are very close together is more accurate than mapping genes that are far apart.
If two genes show a recombination frequency of 1%, how many centimorgans apart are they?
The distance between two genes is 10 centimorgans (cM). What does this mean in terms of recombination frequency?
What is genetic mapping?
What is the maximum recombination frequency that can be observed between two genes?
A geneticist observes the following offspring numbers from a dihybrid test cross: 410 parental type 1, 390 parental type 2, 100 recombinant type 1, and 100 recombinant type 2. Calculate the recombination frequency and explain what this indicates about the linkage between the two genes.
A researcher is mapping four genes (W, X, Y, Z) on a chromosome. The recombination frequencies are as follows: W-X = 8%, X-Y = 12%, Y-Z = 5%, and W-Y = 20%. Based on this data, determine the most likely linear order of the genes and calculate the map distance between W and Z.
