Morgan studied how many traits of Drosophila?
Correct answer: C. 85
- A. 7
- B. 67
- C. 85
- D. All
Explanation
Morgan studied about 85 inherited traits and mutations in Drosophila, using them to investigate genes, chromosomes and linkage. Students may choose 67 because it is another large number, but it is not the commonly cited number of traits in this historical account.
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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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