TLS Online TPP Program

#Question id: 15840


In the yeast cross of ade2 met14 his3 x + + +, a total of 120 tetrads are analyzed. The following tetrad types are found in the numbers shown below each tetrad. The markers ade2, met14, and his3 are abbreviated a, m, and h and the wild type allele of each gene is indicated by +.
 
What were the other two types of tetrads (how many His+ and His– spores do they have)?

#Unit 8. Inheritance Biology
  1. Non-Parental Ditype (N)= 2His+:2His-        
    Tetratype (T)= 0 His+:4 His                           
    Parental Ditype (P)= 1 His+:3 His¬
  2. Non-Parental Ditype (N)= 0 His+:4 His                    
    Tetratype (T)= 1 His+:3 His¬        
    Parental Ditype (P)= 2His+:2His-
  3. Non-Parental Ditype (N)= 1 His+:3 His          
    Tetratype (T)= ¬2His+:2His-        
    Parental Ditype (P)= 0 His+:4 His
  4. Non-Parental Ditype (N)= 2His+:2His-        
    Tetratype (T)= 1 His+:3 His¬        
    Parental Ditype (P)= 0 His+:4 His