And could you explain why A series of chromosomal mutation t

And could you explain why?

A series of chromosomal mutation that in Drosophila were used to map the javelin mutation that affects bristle shape and henna that effects eye pigmentation. Both javelin and henna are recessive and they map to regions 65 of Drosophila polytene chromosomes. A diagram of region 65 is shown below. The chromosomal breakpoints for 4 rearrangements are indicated on the table below. Flies with a chromosome containing one of these four rearrangements (deletions or inversions) were mated to flies homozygous for both javelin and henna). The phenotypes of the F1 are shown below A cross to which chromosome rearrangement gives the most precise location of the javelin gene? inversion A inversion B deletion A deletion B javelin cannot be mapped using these strains

Solution

since in the queation there in point A diagram, there is existing of only 1 to 6, there is absencce of point 1 in region 82 the pont will not be given, so answer may be vary. if we prdict the position accrodingt 65 in 82 than cross muation can not be possible so at that time inversion of A is reqired. so it might be inversion A.