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Genome sequences for most metazoans and plants are incomplete because of the presence of repeated DNA in the heterochromatin. The heterochromatic regions of Drosophila melanogaster contain 20 million bases (Mb) of sequence amenable to mapping, sequence assembly, and finishing. We describe the generation of 15 Mb of finished or improved heterochromatic sequence with the use of available clone resources

Bat Genomes Bats are of great interest because of their ability to fly and as hosts for infectious disease. Zhang et al. (p.

Collected as part of the Schools' Folklore scheme, 1937-1938, under the supervision of teacher An tSr. Úna.

2 images. Roaring Twenties costumes, 1 January 1952. Mildred Fenton; Mrs. Sally Jaconi.(Sleeve reads: S9569).