NEETBiologyPrinciples of Inheritance and VariationMCQ+4 / −1
There are three genes a, b and c. The percentage
of crossing over between a and b is 20%, b and c
is 28% and a and c is 8%. What is the sequence
of genes on chromosome
- Aa, b, c
- Bb, a, c
- Ca, c, b
- DNone
View written solutionFree
Correct answer: B
a – b = 20%, b – c = 28%, a – c = 8%

Percent crossing over between two genes is proportional to the distance between them.
More from Principles of Inheritance and Variation
- On selfing a plant of F1 generation with genotype “AABbCC”,the genotypic ratio in F2 generation will be2002 · MCQ
- A diseased man marries a normal woman. They get three daughter and five sons. All the daughter were diseased and sons were normal. The gene of this disease is : -2002 · MCQ
- A gene said to be dominant if : -2002 · MCQ
- Which of the following is a correct match -2002 · MCQ
- Two nonallelic genes produces the new phenotype when present together but fail to do so independently then it is called : -2001 · MCQ
- Ratio of complementry genes is : -2001 · MCQ
- When dominant and recessive allels express itself together it is called : -2001 · MCQ
- A and B genes are linked. What shall be genotype of progeny in a cross between AB/ab and ab/ab : -2001 · MCQ