Reversal of a secondary sex character by selection
نویسندگان
چکیده
منابع مشابه
Hormonal sex reversal of rainbow trout (Oncorhynchus mykiss) by ethynylestradiol-17α (EE2)
Rainbow trout (Oncorhynchus mykiss) females grow larger and mature later than males, making all-female stocks economically advantageous. The objective of this research was to develop methods for the production of monosex populations of trout through the use of sex steroids. The synthetic estrogen ethynylestradiol-17α (EE2) was administered in single period-immersion treatment of 400 µg/l for 1,...
متن کاملHormonal sex reversal of rainbow trout (Oncorhynchus mykiss) by ethynylestradiol-17α (EE2)
Rainbow trout (Oncorhynchus mykiss) females grow larger and mature later than males, making all-female stocks economically advantageous. The objective of this research was to develop methods for the production of monosex populations of trout through the use of sex steroids. The synthetic estrogen ethynylestradiol-17α (EE2) was administered in single period-immersion treatment of 400 µg/l for 1,...
متن کاملSex Reversal in Amphibians.
Amphibians have been widely used to study developmental biology due to the fact that embryo development takes place independently of the maternal organism and that observations and experimental approaches are easy. Some amphibians like Xenopus became model organisms in this field. In the first part of this article, the differentiation of the gonads in amphibians and the mechanisms governing thi...
متن کاملSex Reversal in Birds.
Sexual differentiation in birds is controlled genetically as in mammals, although the sex chromosomes are different. Males have a ZZ sex chromosome constitution, while females are ZW. Gene(s) on the sex chromosomes must initiate gonadal sex differentiation during embryonic life, inducing paired testes in ZZ individuals and unilateral ovaries in ZW individuals. The traditional view of avian sexu...
متن کاملP-104: Embryo Sex Selection by Migration of Spermatozoa in Different Acidic pH Environment
Background: Today factors including cultural, social, religious, economic and medical such as X Linked diseases encouraged couples to choose traditional methods or new treatment for selecting the gender of child. It seems that Spermatozoa containing chromosomes X and Y have different speed in various pH. In this study the velocity of spermatozoa in different acidic pH was evaluated. Materials a...
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ژورنال
عنوان ژورنال: Heredity
سال: 1953
ISSN: 0018-067X,1365-2540
DOI: 10.1038/hdy.1953.24