Chromosome Maps
Trending Questions
Q. 1 centimorgan signifies
- 1% crossing over.
- 10% crossing over.
- 50% crossing over.
- 100% crossing over.
Q.
The map distances between genes A and B is 3 units, between B anc C is 10 units and between C and A is 7 units. The order of the genes in a linkage map constructed on the above data would perhaps be:
A, B, C
A, C, B
B, C, A
B, A, C
Q. The linear distance between two loci which have a recombination frequency of 1% is known as .
- 1 map unit
- 1 morgan unit
- 1 linkage unit
- 1 chromosome unit
Q.
Determination of percentage of crossing over between two linked genes is important in
Maintaining heterozygosity in population
Indicating relative position of genes in chromosomes
Fixation of heterosis in organisms
Explaining the phenomenon of coupling and repulsion.
Q. Construct a chromosome map with the given crossover frequency of each of the genes.
Gene | Frequency of crossover |
A-C | 30% |
B-C | 45% |
B-D | 40% |
A-D | 25% |
- ABCD
- BADC
- CADB
- DABC