There are _ number of linkage groups in humans.
Correct answer: D. 23
- A. 46
- B. 22
- C. 80
- D. 23
Explanation
This phenomenon of staying together of all the genes of a chromosome is called linkage. Gene linkage is a physical relationship between genes. A chromosome carries its linked genes in the form of a linkage group. The number of linkage groups corresponds to the number of homologous pairs of chromosomes. Man has 23 linkage groups.
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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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