Question

D Question 2 13 pts A culture of yeast that requires uracil for growth (ura3 ) was treated with a mutagen, and two mutant colonies, X and Y, were isolated. Mating type a cells of mutant X were mated with mating type a cells of mutant Y to form diploid cells. The parental (ura3), X, Y, and diploid cells were all streaked onto agar plates containing uracil and incubated at 23 "C or 32 °C. Cell growth was monitored by the formation of colonies on the plates, as shown in the figure below. Which of the following is true of mutations X and Y? Denotes growth of cells ura3 ura3 Diploid X-Y Diploid X-Y Growth at 23°C Growth at 32 °C X and y are mutations in the same gene. X and Y enable uracil biosynthesis X and Y are mutations in different genes X and Y are recessive mutations

Answer 1

Answer will be option 3 - X and Y are mutations in different genes. - If mutation occur on X&Y & both of them were Present on Same gene then diploid x-Y also will be die. So they are not on same gene. - Already given that yeast requires uracid for growth it means ophion & will be coronge - If they are recessive gene then they will nol-going . to show any effect of mutation became Dominant gene will be hide the effect of recessive. - fy are mutations in different genes this I is true this mutation causing death in both of this organisme