NEET-UG Biology · Class 12
Chromosome theory, linkage and recombination — NEET & JEE Questions
Chromosome theory, linkage and recombination is a topic in Principles of Inheritance and Variation, a Class 12 Biology chapter of the NEET-UG syllabus. TestBudy holds 16 published NEET-UG questions on Chromosome theory, linkage and recombination, each with the marking scheme of the real paper. The ideas it examines include Chromosomal theory of inheritance, Morgan's fruit fly linkage experiments, Recombination frequency and gene distance.
- questions
- 16
- shown here
- 10
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Key formulas and concepts
The ideas Chromosome theory, linkage and recombination is examined on, as they are tagged in the syllabus tree.
- Chromosomal theory of inheritance
- Morgan's fruit fly linkage experiments
- Recombination frequency and gene distance
Chromosome theory, linkage and recombination MCQs with solutions
10 of the 16 published questions on this topic, exactly as they appear in a test. Answers and worked solutions come with your result rather than on this page.
Exchange of segments between non-sister chromatids of homologous chromosomes:
- A. crossing over
- B. translation
- C. transcription
- D. segregation only
Genes located close together on the same chromosome tend to show:
- A. independent assortment always
- B. complete dominance
- C. polyploidy
- D. linkage
The chromosome theory of inheritance states that genes are carried on
- A. chromosomes
- B. ribosomes
- C. lysosomes
- D. cell walls
Genes located close together on the same chromosome tend to be inherited together because they are
- A. linked
- B. independent by definition
- C. always allelic
- D. on homologous chromosomes only
Recombination frequency between two linked genes generally increases as
- A. the distance between the genes increases
- B. the genes become closer together
- C. the genes become alleles of the same locus
- D. crossing over is completely prevented
Frequency of recombination between gene pairs on same chromosome as a measure of the distance between genes to map their position on chromosome, was used for the first time by
- A. Sutton and Boveri
- B. Alfred Sturtevant
- C. Henking
- D. Thomas Hunt Morgan
In meiosis, crossing over and exchange of genetic material between homologous chromosomes are catalyzed by the enzyme
- A. Polymerase
- B. Phosphorylase
- C. Recombinase
- D. Transferase
Given below are two statements : one is labelled as Assertion (A) and the other is labelled as Reason (R). Assertion (A) : Mendel's law of independent assortment does not hold good for the genes that are located closely on the same chromosome. Reason (R) : Closely located genes assort independently. In the light of the above statements, choose the correct answer from the options given below :
- A. Both (A) and (R) are correct and (R) is the correct explanation of (A)
- B. Both (A) and (R) are correct but (R) is not the correct explanation of (A)
- C. (A) is correct but (R) is not correct
- D. (A) is not correct but (R) is correct
The recombination frequency between the genes a & c 5&, b & c is 15%, b & d is 9%, a & b is 20%, c & d is 25% and a & d is 29%. What will be the sequence of these genes on a linear chromosome?
- A. a, d, b, c
- B. d, b, a, c
- C. a, b, c, d
- D. a, c, b, d
The chromosomal theory of inheritance was proposed by
- A. Robert Brown
- B. Thomas Morgan
- C. Sutton and Boveri
- D. Gregor Mendel
Common mistakes in Chromosome theory, linkage and recombination
Recorded against questions in this topic that are not shown above, so none of these points at an answer you can see on this page.
- Assuming all genes on the same chromosome have identical recombination frequencies.
- Divides or doubles the recombination percentage without applying the map-unit convention.
- Assumes higher recombination means stronger linkage.
- Labels the rare recombinant classes as parental or calculates recombination from the parental total.
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