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Suppose that investigators crossed the strain of flies carrying dominant eye mutation Lobe on second chromosome with the strain homozygous for second chromosome recessive mutation smooth abdomen and straw body. The F1 Lobe female were then back crossed with the homozygous smooth abdomen, straw body males and following phenotypes were observed:

Smooth abdomen, straw body                                       820

Lobe                                                                              780

Smooth abdomen lobe                                                    42

Straw body                                                                      58

Smooth abdomen                                                           148

Lobe, straw body                                                           152

a) Provide the gene order and map units between these three loci.

b) What is coefficient of the coincidence?

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  • Category:- Biology
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