Reference no: EM131470808

Problem 1

Three recessive genes on chromosome 2 of Drosophila melanogaster are: welt , cinnabar , and brown . The numbers of phenotypes from a trihybrid test cross are shown below:

Wild type	265
welt ,cinnabar ,brow n	239
brown	155 7
welt ,cinnabar	150 9
cinnabar	859
welt ,brown	829
welt	236 8
brown ,cinnabar	236 5

What is the gene order and map distance between the three genes and what is the percent interference?

Problem 2

Three recessive genes on chromosome 1 of Drosophila melanogaster are: prawny , no bridge , and cut. The numbers of phenotypes from a trihybrid test cross are shown below:

Wild type	2
prawny ,no bridge ,cut	10
no bridge	196
prawny ,cut	191
cut	109
prawny ,no bridge	131
prawny	354 4
no bridge ,cut	348 1

What is the gene order and map distance between the three genes and what is the percent interference?

Problem 3

Three recessive genes on chromosome 3 of Drosophila melanogaster are: claret , rough , and ebony. The numbers of phenotypes from a trihybrid test cross are shown below:

Wild type	90
claret ,rough ,ebon y	93
claret	824
rough ,ebony	774
ebony	390
claret ,rough	372
rough	261 9
claret ,ebony	259 0

What is the gene order and map distance between the three genes and what is the percent interference?

Problem 4 Three recessive genes on chromosome 2 of Drosophila melanogaster are: brown, welt, and cinnabar. The numbers of phenotypes from a trihybrid test cross are shown below:

Wild type	597
brown ,welt ,cinnaba r	629
brown	167 2
welt ,cinnabar	170 2
cinnabar	201
brown ,welt	173
welt	106 1
brown ,cinnabar	107 0

What is the gene order and map distance between the three genes and what is the percent interference?

Problem 5 Three recessive genes on chromosome 1 of Drosophila melanogaster are: wider , prawny , and no bridge . The numbers of phenotypes from a trihybrid test cross are shown below:

Wild type	332 1
wider ,prawny ,no bridge	336 5
no bridge	154
wider ,prawny	131
wider	732
prawny ,no bridge	763
prawny	29
wider ,no bridge	21

What is the gene order and map distance between the three genes and what is the percent interference?

Problem 6 Three recessive genes on chromosome 2 of Drosophila melanogaster are: dachs , aristaless , and odd skipped. The numbers of phenotypes from a trihybrid test cross are shown below:

Wild type	341
dachs ,aristaless ,odd skipped	288
aristaless	274 9
dachs ,odd skipped	277 9
dachs	66

aristaless ,odd skipped	70
odd skipped	888
dachs ,aristaless	950

What is the gene order and map distance between the three genes and what is the percent interference?