The Ursinus Weekly, December 15, 1947

Dance, banquet to highlight eventful pre-Christmas week • Large audience lauds Messiah presentation • Barrett-Browning story lives again at Ursinus in Curtain Club drama • Thirteen Ursinus seniors will appear in \u2747-\u2748 Who\u27s Who Among Students • Unique game opens junior band drive • European aid poll sponsored by PAC • Rettew presents Christmas story for candlelight vesper service • Ursinus group gains experience at debate tourney in Vermont • Freshmen issue first copy of new Highlights of \u2751 • Christmas carols to echo over campus Wednesday night in traditional custom • Dormitory thefts solved; Local man pleads guilty • WSGA passes two regulations • Poem by Wentzel selected for anthology publication • Dr. Miller AVC forum guest • Commentator: The Geneva conference • Room for improvement • Alumni-society notes • Important notice • The Christmas season • Rebellion and war part of daily life for Bob Hekking, formerly of Shanghai • More college musical talent discovered as two sophs make hit in swing trio • Vox pop • Shreiner behind Ruby 100% • On the boards • Court mentor Seeders commends enthusiasm of this year\u27s team • Kimono kids trip Bearettes, 2-0, in field hockey upset • Local wrestlers drill for Haverford match • Basketeers down Elizabethtown, 46-42, in season\u27s inaugural: Varsity stops last minute E-Town surge; JV\u27s baffled by visitors\u27 zone defense • Local mermaid squad prepares for \u2748 debut under new instructor • Dinners planned to honor football and soccer teams • Bears, Pharmacy 5 tangle tomorrow • Tentative arrangements planned for intra-mural court tourney • Shreiner-Hobson annexes crown in interdorm hockey loop race • Ski Club arranges meeting • Business Administration group hears talk on life insurance career • Political confusion to be topic for PAC commission • Simons chosen for soccer finals • Day Study girls conduct drive • Annex students form Hillbilly Band ; To play at Spanish Club meeting tonite • Curtain Club plans purchaseshttps://digitalcommons.ursinus.edu/weekly/3124/thumbnail.jp

The Lantern Vol. 15, No. 1, Fall 1946

• Public, Speaking • Concept • The Storm • Yes Sir! • Messengers of Death • The Anonymous Letter • Best Trust the Happy Moments • Disillusionment • The Man With the Water-Brown Eyes • Poetry • Who Knows?https://digitalcommons.ursinus.edu/lantern/1040/thumbnail.jp

The Lantern Vol. 16, No. 3, Spring 1948

• Not So Light • Babba\u27s Luck • Winter Night • God Hath Wrought • Less Than Trivia • What is Progress? • Betrayal • The Key • Journey From a Star • War and Peace • Experiment in Prose Poetry • Dawn • Eternal Question • My Gift • Jazz Fantasy • M.W. Witmerhttps://digitalcommons.ursinus.edu/lantern/1045/thumbnail.jp

The Lantern Vol. 16, No. 1, Fall 1947

• A Little Light • Social Solidarity • The Struggle • 1949 Report • Blues • Angel\u27s Wings • Street Death • The Giant • Not Alone • B or Something • After Argument • Friendship • Built That Way • The Passing • Freshman • Asleep • John J. Heilemannhttps://digitalcommons.ursinus.edu/lantern/1043/thumbnail.jp

\u3ci\u3eDrosophila\u3c/i\u3e Muller F Elements Maintain a Distinct Set of Genomic Properties Over 40 Million Years of Evolution

The Muller F element (4.2 Mb, ~80 protein-coding genes) is an unusual autosome of Drosophila melanogaster; it is mostly heterochromatic with a low recombination rate. To investigate how these properties impact the evolution of repeats and genes, we manually improved the sequence and annotated the genes on the D. erecta, D. mojavensis, and D. grimshawi F elements and euchromatic domains from the Muller D element. We find that F elements have greater transposon density (25–50%) than euchromatic reference regions (3–11%). Among the F elements, D. grimshawi has the lowest transposon density (particularly DINE-1: 2% vs. 11–27%). F element genes have larger coding spans, more coding exons, larger introns, and lower codon bias. Comparison of the Effective Number of Codons with the Codon Adaptation Index shows that, in contrast to the other species, codon bias in D. grimshawi F element genes can be attributed primarily to selection instead of mutational biases, suggesting that density and types of transposons affect the degree of local heterochromatin formation. F element genes have lower estimated DNA melting temperatures than D element genes, potentially facilitating transcription through heterochromatin. Most F element genes (~90%) have remained on that element, but the F element has smaller syntenic blocks than genome averages (3.4–3.6 vs. 8.4–8.8 genes per block), indicating greater rates of inversion despite lower rates of recombination. Overall, the F element has maintained characteristics that are distinct from other autosomes in the Drosophila lineage, illuminating the constraints imposed by a heterochromatic milieu