Studies in Spermatogenesis (Part 1 of 2)

Studies in Spermatogenesis (Part 1 of 2)In connection with the problem of sex determination it has seemed...
€6,34 EUR
€6,34 EUR
SKU: gb-31545-ebook
Product Type: Books
Please hurry! Only 10000 left in stock
Author: Stevens, N. M. (Nettie Maria),1861-1912
Format: eBook
Language: English
Subtotal: €6,34
10 customers are viewing this product
Studies in Spermatogenesis (Part 1 of 2)

Studies in Spermatogenesis (Part 1 of 2)

€6,34

Studies in Spermatogenesis (Part 1 of 2)

€6,34
Author: Stevens, N. M. (Nettie Maria),1861-1912
Format: eBook
Language: English

Studies in Spermatogenesis (Part 1 of 2)

In connection with the problem of sex determination it has seemed necessary to investigate further the so-called "accessory chromosome," which, according to McClung ('02), may be a sex determinant. This view has been supported by Sutton ('02) in his work on Brachystola magna, but rejected by Miss Wallace ('05) for the spider. The forms selected for study have been taken from several groups of insects, and are all species whose spermatogenesis has not been previously worked out. They are (1) a California termite, Termopsis angusticollis; (2) a California sand-cricket, Stenopelmatus; (3) the croton-bug, Blattella germanica; (4) the common meal-worm, Tenebrio molitor; and (5) one of the aphids, Aphis nother. A brief account of a chromatin element resembling the accessory chromosome in Sagitta has been added for comparison. The spermatogenesis of each form will be described in detail, and a general discussion of the results and their relation to the accessory chromosome and sex determination will follow. The spermatogenesis of the aphid has been included in another paper, but a summary of results and a few figures will be given here for reference in the general discussion. ......Buy Now (To Read More)

Product details

Ebook Number: 31545
Author: Stevens, N. M. (Nettie Maria)
Release Date: Mar 7, 2010
Format: eBook
Language: English

Returns Policy

You may return most new, unopened items within 30 days of delivery for a full refund. We'll also pay the return shipping costs if the return is a result of our error (you received an incorrect or defective item, etc.).

You should expect to receive your refund within four weeks of giving your package to the return shipper, however, in many cases you will receive a refund more quickly. This time period includes the transit time for us to receive your return from the shipper (5 to 10 business days), the time it takes us to process your return once we receive it (3 to 5 business days), and the time it takes your bank to process our refund request (5 to 10 business days).

If you need to return an item, simply login to your account, view the order using the "Complete Orders" link under the My Account menu and click the Return Item(s) button. We'll notify you via e-mail of your refund once we've received and processed the returned item.

Shipping

We can ship to virtually any address in the world. Note that there are restrictions on some products, and some products cannot be shipped to international destinations.

When you place an order, we will estimate shipping and delivery dates for you based on the availability of your items and the shipping options you choose. Depending on the shipping provider you choose, shipping date estimates may appear on the shipping quotes page.

Please also note that the shipping rates for many items we sell are weight-based. The weight of any such item can be found on its detail page. To reflect the policies of the shipping companies we use, all weights will be rounded up to the next full pound.

Related Products

Recently Viewed Products