Question

45. (2 pts) A. If two mutants complement each other, you would conclude that thes genels, If mutants fail to can co complement, you can conclude that the mutations are in You performed a mutant screen to study color development in beets, and obtained several mutants that are golden in color. You mate these mutant strains for complementation tests and get the following results. (+'indicates wildtype (red), while indicates the mutant phenotype of golden.) m1 m2 m3 m1 m2 m3 m4 m6 m7 (2pts) a) You have identified mutations in (insert number) genes (1pt) b) Write the complementation groups. (3pts) c) In addition to the golden mutation, you have mutant m8 that is w All of and m9 that is purple. plementation tests. You the mutations are in different genes as determined by com make double mutants and obtain these results: m1/m1 m9/m9 mi/ml: m8/m8 white white m golden Based on the double mutant of mi and m8, mutans Based on the double mutant of m1 and m9, And the order of genes in the pathway is is epistatic to mutant # mutant #--is epistatic to m 1o

Answer 1

Ans1. different genes, same genes

Ansb. complementation group

I) m1m3 and m2m3

ii) m1m4, m2m4, m3m4

iii) m1m5, m2m5, m3m5

iv) m1m6, m2m6, m3m6, m4m6, m5m6

v) m1m7, m2m7, m4m7, m5m7, m6m7

Ans3. mutant m8/m8 is epistasis on m1/m1 because m8 is dominant on m1and show white colour.

mutant m1/m1is epistasis on m9/m9, because m1 is dominant on m9 and show golden colour.

gene order should be. m8/m8 m1/m1m9/m9.