For clarification, they want to regress D (genetic distance) on time. Regressing

Question

For clarification, they want to regress D (genetic distance) on time. Regressing the slope itself on time is not what is needed. Thank you! total years divergence from fossil record Comparison human-chim rat mouse human rhesus dog - cat dolphin-cow human -mouse rabbit mouse dog-horse dog-cow human-cow human elephant human-opossum human-platypus Lizard - human base differences sequence 3609 3609 3609 3609 3609 3609 3609 3609 3609 3609 3609 3609 3609 3609 34 294 8250000 11150000 28450000 53300000 59100000 81000000 81000000 66750000 84600000 93500000 103250000 131500000 176800000 321300000 7 549 307 764 267 536 588 634 974 858 1166

Explanation / Answer

I have calculated the slope using Excel and copied the cells below for you to understand. After you populate the cells in Excel use the function SLOPE to calculate the "slope of regression". Your y-values are Genetic Distance, D and your x-values are Time (in years)

Slope = 9.44E-10

3. For calculation of molecular evolution we will divide the above calculated slope by 2.

So, your molecular evolution = 9.44E-10/2 = 4.7E-10. Therefore your answer is (B)

A B Genetic
Distance
D = A/B Time (Yrs) 34 3609 9.42E-03 8.25E+06 294 3609 8.15E-02 1.12E+07 177 3609 4.90E-02 2.85E+07 549 3609 1.52E-01 5.33E+07 307 3609 8.51E-02 5.91E+07 764 3609 2.12E-01 8.10E+07 267 3609 7.40E-02 8.10E+07 536 3609 1.49E-01 6.68E+07 588 3609 1.63E-01 8.46E+07 634 3609 1.76E-01 9.35E+07 604 3609 1.67E-01 1.03E+08 974 3609 2.70E-01 1.32E+08 858 3609 2.38E-01 1.77E+08 1166 3609 3.23E-01 3.21E+08

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