A genetics experiment involving 1500 Drosophila fruit flies is being analyzed. T

Question

A genetics experiment involving 1500 Drosophila fruit flies is being analyzed. The expected frequency of double cross-overs between three genes on a chromosome has be measured at 0.95%. However, when the actual number of double cross-overs is counted, only 5 of the 1500 flies show this phenomenon. Using this data, the coefficient of coincidence and interference can be calculated as A. 0.65 and 0.35 B. 2.8 and 1.8 C. 0.35 and 0.65 D. 0.19 and 0.81 E. There is not enough information provided to answer this question

Explanation / Answer

Coefficient of coincidence=(observed frequency÷expected frequency of double cross overs). Observed frequency=5/1500=0.0033 or 0.33% Thus,c.o.c= (0.33/0.95)=~0.35. Now, coefficient of interference= (1-c.o.c), which is equal to (1-0.35)=0.65. Thus, correct option is (C)

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