30) A homozygous groucho fly (g, bristles about the eye) iscrossed with a homozygous rough fly (r, eye abnormality). The F1females are test crossed to a groucho, rough fly. The followingdata was obtained.
514 Groucho
466 Rough
11 Groucho, rough
9 Wild type
Are these genes linked? Is the F1 in coupling or repulsionphase. Draw out the heterozygous parents genotype onchromosomes.
33)
Three corn genes, R, D and Y lie on chromosome 9. The map of thethree genes, using map units is:
           20       40
R -------D--------------Y
A heterozygous plant (R D Y/r d y) is crossed with a testcrossparent (r d y/r d y) :
how many double cross over progeny would be expected in aprogeny of 1000 if there were no interference?
What is the interference if there are 50 DCOs?
B= brown body, b = black body, N =non-waxy wings, n = waxy wings, R = red eyes, r = cinnabar eyes
What is the order of the genes?
What is the recombination frequency for each gene pair?
Draw a map with the genes listed and the correct map units.
Is there interference? If so what is the value.
