Please help me answer these biology questions about linkage mapping.i will give

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Please help me answer these biology questions about linkage mapping.i will give thumbs up. Thank you Linkage Mapping 29. You have isolated three new recessive mutations in Drosophila: green-eye (R), fuzzbal and crooked wing (c). You cross homozygous parents to create several heterozygous F1s with genotype GgFf, GgCc, and GgFfcc. A GgFf x ggf gamete frequencies: 39% GF, 1196 Gf, 9% gF, and 41% gf. A GgCc gamete frequencies of 49% GC, 2% Gc, 2% gc, and 47% the G, F, and C genes are linked? Explain your answer f cross reveals the following x ggcc cross reveals gc. Do these crosses suggest that 30. You perform a GgFfCc x ggffcc cross and produce the offspring described in the table below. Use these offspring to build a linkage map of the G, F, and C genes. Note that phenotypes are written as italicized letters representing dominant (capital) or recessive (lower case) phenotypes. For example, the individual GfC has the dominant phenotypes for eye color and wings and the recessive fuzzball phenotype. (# recombinant offspring)/(total # offspring) and that Hint: recall that % recombination 1% recombination 1 map unit Phenotype GFC Number363 offspring 89 18 3 106 17 402

Explanation / Answer

29. A cross between double heterozygote with complete recesseive parent is reffered as test cross.

If the test cross ratio shows 1:1:1:1 which indicates that those gene assorted independently, hwich means those two genes are present on two different chromosomes.

If the test cross ratio is not showing 1:1:1:1, which indicates that those genes are linked genes. Which means those genes are present on same chromosome.

Here in this crosses, either the progeny between GgFf * ggff or GgCc * ggcc is not following 1:1:1:1 ratio, which indicates that those genes are linked. Which means those genes are present on same chromosome.

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