The chance of a cross-over between two loci is directly proportional to their:
Correct answer: C. Distance
- A. Length
- B. Width
- C. Distance
- D. Thickness
Explanation
The value of Cross over or recombination frequency is directly proportional to the distance between the genes on the gene map. The recombination frequency is directly proportional to the distance between the linked gene loci. Genes can be mapped on a chromosome on the basis of their recombination frequencies. If 1% of recombination frequency is equal to 1 unit map distance, the two linked genes A and B with a 20% recombination frequency must be 20 units apart.
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About Gene Linkage and Crossing Over
Linked genes lie on the same chromosome and tend to pass together, unlike genes that assort independently on different chromosomes. The topic connects linkage with homologous pairing, crossing over during prophase I of meiosis, recombinant and parental offspring, and recombination frequency as an estimate of gene distance.
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More Gene Linkage and Crossing Over questions
Crossing over brings:
Which of the following reduces the chance of recombination and variation?
There are _ number of linkage groups in humans.
Locus of a gene on a chromosome means its:
What is the name of the process by which genetic material is shuffled during meiosis, increasing genetic variation?
The phase of meiosis during which the non-sister chromatids of homologous chromosomes may exchange their segments: