Chicken sex determination

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A new gene technology to differentiate between male and female chicks pre-hatch could improve animal production, reduce costs and eliminate ethical dilemmas for the egg and poultry industries. Recent advances in gene technology mean that it is now possible to differentiate between male and female chicks pre-hatch. This discovery provides an opportunity to improve animal production, reduce costs and eliminate ethical dilemmas in the egg laying and related industries. Enlarge image Recent advances in gene technology mean that it is now possible to differentiate between male and female chicks pre-hatch.
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Chicken Sexing - How To Determine The Gender Of Your Chickens

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Chick sexing - Wikipedia

This post contains affiliate links. For more information click here. Many of us who keep backyard chickens raise them from hatchlings or day old chicks. And, sometimes our curiosity gets the better of us and we wonder whether these fluffy little ones will grow up to be clucky hens or crowing roosters. As a backyard chicken keeper, you can learn to sex your chicks by simple observation, for the most part. The first and most versatile method for sexing the widest variety of chicken breeds is to note the occurrence of wing feather development. Lastly, and the most reliable, as well as, the most complex method of all, is the vent sexing method.
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Sex determination and gonadal sex differentiation in the chicken model

The ZW sex-determination system is a chromosomal system that determines the sex of offspring in birds , some fish and crustaceans such as the giant river prawn , some insects including butterflies and moths , and some reptiles, including Komodo dragons. The letters Z and W are used to distinguish this system from the XY sex-determination system. In this system, females have a pair of dissimilar ZW chromosomes , and males have two similar ZZ chromosomes. In contrast to the XY sex-determination system and the X0 sex-determination system , where the sperm determines the sex, in the ZW system, the ovum determines the sex of the offspring.
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Analysis of gynandromorphic chickens and experimental chimeras indicate that sexual phenotype is at least partly cell autonomous in the chicken, with sexually dimorphic gene expression occurring in different tissue and different stages. Gonadal sex differentiation is just one of the many manifestations of sexual phenotype. As in other birds, the chicken has a ZZ male: ZW female sex chromosome system, in which the male is the homogametic sex. Most evidence favours a Z chromosome dosage mechanism underling chicken sex determination, with little evidence of a role for the W chromosome. Indeed, the W appears to harbour a small number of genes that are un-related to sexual development, but have been retained because they are dosage sensitive factors.
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