Detlefsen J A (18 results)

PAP. Condition: New. New Book. Shipped from UK. Established seller since 2000.

PAP. Condition: New. New Book. Shipped from UK. Established seller since 2000.

Pamphlet. Condition: Good. 8 p. This is a Pamphlet, an offprint/reprint. Archive number on the upper left of the cover. Good condition overall. No marks. The year of publication noted is that of the publication year of the essay when it was origninally published in the journal or magazine.

PAP. Condition: New. New Book. Shipped from UK. Established seller since 2000.

PAP. Condition: New. New Book. Shipped from UK. Established seller since 2000.

Paperback. Condition: New. New copy - Usually dispatched within 4 working days.

HRD. Condition: New. New Book. Shipped from UK. Established seller since 2000.

HRD. Condition: New. New Book. Shipped from UK. Established seller since 2000.

Condition: New. Print on Demand.

Condition: New. KlappentextrnrnUnlike some other reproductions of classic texts (1) We have not used OCR(Optical Character Recognition), as this leads to bad quality books with introduced typos. (2) In books where there are images such as portraits, maps, sketc.

Paperback. Condition: New. Print on Demand. This book presents a comprehensive analysis of a genetic study conducted on a cavy species cross between the common domestic guinea pig and the wild Brazilian cavy, Cavia rufescens. The author, a geneticist, received three wild cavies in 1909 and began a series of experiments to investigate the inheritance of various characters in these hybrids. The book focuses on five main character groups: color and coat, growth and morphological, fertility, and the inheritance of sterility. The author's research revealed that the wild cavies used in the study were homozygous in agouti, a factor responsible for restricting black or brown pigmentation in the hair. This agouti factor proved dominant over its absence in the domestic guinea pig, demonstrating the power of wild genetic traits in cross-species breeding. The author's detailed observations and analysis provide valuable insights into the complex interactions of genes in a species cross. The study contributes to our understanding of the inheritance of specific traits, the genetic basis of fertility, and the challenges of working with sterile male hybrids. This book is a reproduction of an important historical work, digitally reconstructed using state-of-the-art technology to preserve the original format. In rare cases, an imperfection in the original, such as a blemish or missing page, may be replicated in the book. print-on-demand item.…

Pamphlet. Condition: Collectible; Very Good. Prompt Shipment, shipped in Boxes, Tracking PROVIDEDOffprint. Reprinted from Genetics vol. 3, 1918. Stamped signatures of E.M. East and Karl Sax. Offprint. Original wrappers.*.

Pamphlet. Condition: Collectible; Very Good. Prompt Shipment, shipped in Boxes, Tracking PROVIDEDOffprint. Reprinted from the American Naturalist vol. L, 1916. Stamp in ink (J.T. Baldwin Jr.) First separate edition. Original wrappers. Offprint.*.

Pamphlet. Condition: Collectible; Very Good. Prompt Shipment, shipped in Boxes, Tracking PROVIDEDOffprint. First edition. Offprint. Original wrappers. Carnegie Institution of Washington, Publication No. 205. Paper No. 23 of the Station for Experimental Evolution at Cold Spring Harbor, New York. From the Laboratory of Genetics, of the Bussey Institution, Forest Hill, Massachusetts. Ownership stamp from J.T. Baldwin front cover else very good *.…

Pamphlet. Condition: Collectible; Very Good. Prompt Shipment, shipped in Boxes, Tracking PROVIDEDOffprint. 1921. Reprinted from The Journal of Experimental Zoology, Vol. 32, No. 2. Ownership signature of J.H. Quisenberry. First separate edition. Offprint. Original wrappers. *.

Pamphlet. Condition: Good. Prompt Shipment, shipped in Boxes, Tracking PROVIDEDOffprint. Staple binding, previous owner stramped upper right hand side, clean pages, Reprinted without change of paging from the Journal of Heredity(Organ of the American Genetic Association) Washington D. C. Vol. XIII No.6, June-July 1921.…

Paperback. Condition: New. This item is printed on demand. New copy - Usually dispatched within 5-9 working days.

Paperback. Condition: new. Paperback. This special re-print edition of Detlefsen's book "Genetic Studies On A Cavy Species Cross" contains all the information a person needs to master the basics of raising Cavies or Guinea Pigs. Written in 1914, this book contains information gleaned from studies on the subject of Cavy genetics. The study involved crossing the species Cavia rufscens to Domestic Guinea Pigs and back-crossing their fertile female offspring to the parent species for successive generations. Subsequently, the inheritence of coat colors and other characteristics were studied. Note: This edition is a perfect facsimile of the original edition and is not set in a modern typeface. As a result, some type characters and images might suffer from slight imperfections or minor shadows in the page background. This item is printed on demand. Shipping may be from our UK warehouse or from our Australian or US warehouses, depending on stock availability.…