Association between the presence of subtelomeric elements and TL. (A) Distributions of the normalized extremity-specific TL means across the extremities of all strains, clustered according to the presence or absence of the X element in the corresponding subtelomere. The number of chromosome extremities in each group is indicated by “n”. The P-value from a Student's t-test is indicated. (B) Same as A but with respect to the presence or absence of the Ty5 retrotransposon in the corresponding subtelomere. (C) Same as A but with respect to the presence or absence of Y′ elements in the corresponding subtelomere. (D) Same as C but with respect to the number of tandem Y′ elements in the corresponding subtelomere. (E) For each strain, extremities are clustered according to the presence (green dots) or absence (red dots) of the Y′ element. For each strain and within each cluster, the average of normalized extremity-specific TLs is plotted against fraction of extremities with Y′ elements in the same strain.