Determining sex of chickens

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A brief, chilly spell can change the sex of chickens in the egg, the festival learnt yesterday. The finding, which has been patented, could eventually lead to big changes in the poultry industry, writes Nicholas Schoon. If the temperature is dropped by a few degrees for three days during the embryological development of a freshly laid egg, some chickens which should hatch out male instead become female. They have the genes and chromosomes for maleness but they are fully functional females able to lay fertile eggs. If they are then crossed with normal males, the resulting chicks are all male, said Professor Mark Ferguson of the University of Manchester.
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How To Determine Sex of Baby Chickens

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Can chickens really change gender? - BBC Science Focus Magazine

Generally, you should be able to start to determine gender in poultry at or around 12 weeks or so, sometimes earlier. See the photos below for some visual clues on gender. A good way to try to determine males from females is to look for saddle feathers. Hold a bird with the head facing you, looking down on it so you can see its back. When you look at the feathers just in front of the tail, which are called the saddle feathers, are they pointy, or rounded? Pointy saddle feathers mean it's a male bird, or cockerel.
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Sex-determination system

A sex-determination system is a biological system that determines the development of sexual characteristics in an organism. Most organisms that create their offspring using sexual reproduction have two sexes. Occasionally, there are hermaphrodites in place of one or both sexes. There are also some species that are only one sex due to parthenogenesis , the act of a female reproducing without fertilization.
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This post contains affiliate links. For more information click here. The world of chicken breeds can be confusing for new chook keepers. Frankly, it even scrambles the brains of some eggs-perienced chicken keepers! But what eggs-actly are sex link chickens?
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