First time crossing over was observed in ___________?
Correct answer: C. 1911
- A. 1811
- B. 1927
- C. 1911
- D. 1990Educational Resources
Explanation
Crossing over was first observed and reported in 1911, during early genetic studies of linked genes and chromosome exchange. Students may choose 1927 because that date is associated with other important genetics research, but it was not the first observation of crossing over.
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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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