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Select the correct statement from the ones given below with respect to dihybrid cross.
- Option 1)
Tightly linked genes on the same chromosome show higher recombination
- Option 2)
Genes far apart on the same chromosome show very few recombinations
- Option 3)
Genes loosely linked on the same chromosome show similar recombination the tightly linked ones
- Option 4)
Tightly linked genes on the same chromosome show very few recombinations
Answers (1)
As learnt
Recombination -
Morgan experimented and found that when the two genes in a hybrid cross situated on same chromosone, the proportion of parental gene combination were much higher than the non-parental type..
Based on this observation, he coined the term recombination.
- wherein
To describe the generation of non-parental gene combinations
Cross B in Morgan's Experiment -
In cross B, genes were loosely linked and showed higher recombination.
- wherein
White and miniature wing showed 37.2% recombination.
Genetic Maps -
Genetic maps are widely used as a starting point in the sequence of whole genomes.
- wherein
In a genetic map, the frequency of recombination between genes pairs on the same chromosomes is a measure of the distance between genes, and 'mapped' their positions on the chromosomes.
Recombination is not easy for tightly linked genes on the same chromosome.
Option 1)
Tightly linked genes on the same chromosome show higher recombination
This option is incorrect
Option 2)
Genes far apart on the same chromosome show very few recombinations
This option is incorrect
Option 3)
Genes loosely linked on the same chromosome show similar recombination the tightly linked ones
This option is incorrect
Option 4)
Tightly linked genes on the same chromosome show very few recombinations
This option is correct
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