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In a three-point test cross, two classes of offspring… | StemPy Lab
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In a three-point test cross, two classes of offspring are far rarer than all the others. What do these two classes show?
Biology
Hard
High School (11–12)
Heredity and Evolution
Created by
StemPy Lab
In a three-point test cross, two classes of offspring are far rarer than all the others. What do these two classes show?
They are the parental classes, and the gene that differs is at the end
They come from mutations, so they are left out
They are the double crossovers, and the gene that differs from the parental classes is in the middle
They are the single crossovers, and the gene order cannot be found
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← A student finds a chi-square value of 9.2 for a test with 3 degrees of freedom. The critical value at the 5 per cent level is 7.81. What does she conclude?
The distance from A to B is 10 map units and from B to C is 20 map units. If the crossovers were independent, 2 per cent of the offspring would be double crossovers. The test cross shows 1.4 per cent. What is the coefficient of coincidence? →
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