Gene Maps- Practice Sack Gray bodies in flies are dominant over gray bodies. Nor
ID: 188983 • Letter: G
Question
Gene Maps- Practice Sack Gray bodies in flies are dominant over gray bodies. Normal wings are dominant over vestig al wings and red eyes are dominant over purple eyes. Using the information below calculate the recombination frequencies to determine if the genes are linked. If they are linked arrange them in a gene map indicating the distance between them. A gray body, normal winged fly is crossed with a black vestigial winged fly. The following F1 generation is produced Gray body, normal wings 778 8+162 Black body, vestigial wings 785 1188s tist6 Black body, normal wings 158 Gray body, vestigial wings 162 nked A gray body, red eyed fy is crossed with a black body, purple eyed fly. The following F1 generation is produced Gray body, red eyes 721 Black body, purple eyes751 Black body, red eyes 45 Gray body, purple eyes 49 94 1sb6 nked A, red eyed, normal winged fly is crossed with a purple eyed, vestigial winged fly. The following F1 generation is produced. red eyes, normal wings 350 purple eyes, vestigial wings 362 red eyes, vestigial wings 42 purple eyes, Normal wings 46 42t46 11 LMU liakedExplanation / Answer
This can be calculated the percentage of crossing-over between the loci:
This can be done by adding the number of individuals in the two recombinant types of offspring, dividing by the total number of offspring and multiply by 100
1. 158+162/158+162+778+785= 320/1883= 0.169x100= 16.9
2. 45+49/45+49+751+721=94/1566= 0.06x100=6.0
3. 42+46/42+46+350+362= 88/800=0.11x100=11
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