Why is the cockscomb getting smaller and smaller, and how does the chicken s big crown become smalle

This should be related to the theory of sexual selection in evolution theory, which is a sexual characteristic that the rooster has evolved in order to attract hens. In the case of hens, they can judge that the rooster is healthier by its bright color and beautiful shape of the comb, and it is in the reproductive interest of the hen to produce more robust offspring by mating with it.

A more extreme example of sexual selection is the feathers of a male peacock. Gorgeous peacock feathers should not exist under the theory of natural selection, because too large and cumbersome feathers will be difficult to escape the predation of their predators. However, since the male peacock can attract the female peacock in this way, it means that the male peacock can still exist even with this flashy appearance, which symbolizes the robustness of the male peacock.

So this kind of irrationality between different species is preserved because of the sexual selection within the same species.

The cockscomb, the mane of a lion, the horns of a buck, and the bright colors of the feathers of various males, although not as extreme as peacock feathers, are all justified by the explanation of sexual selection.

A long, long time ago, I read a children's book that said that chickens came from ancient dinosaurs, like most of some dinosaurs with feathers, they had a meat crown, and this meat crown could absorb light energy and dissipate heat. The ancestors of chickens were actually dinosaurs, which is incredible and impressive, and I still remember it until now, but it is no wonder that the dinosaurs became extinct because chickens had such powerful ancestors and were reduced to protein-rich meat dishes on the human table.

A symbol, like the lion's mane, a symbol of power in the flock.

Summary. Hello, the large crown and small crown of chickens are determined by genetics, so to make the big crown of chickens become small crowns needs to be achieved through genes or selective breeding. Gene technology is an advanced biotechnology that can change the genetic information of organisms through precise genetic manipulation, so as to achieve the regulation of biological traits.

Through genetic technology, certain genes can be selectively cut, inserted, or replaced, thus altering the genetic genes of chickens, turning their large crowns into small crowns. In addition, selective breeding is also an effective method. By selecting chickens with small crowns for breeding, the offspring with small crowns can be gradually screened out, so as to achieve the purpose of changing the large crown of chickens into small crowns.

In short, in order to make the large crown of chickens become small crowns, it is necessary to use modern biotechnology and breeding technology to carry out genetic and selective breeding, so as to realize the regulation of chicken genes.

Hello, the chicken's big crown and small crown are determined by genetics, so to make the chicken's big crown into a small thick crown needs to be achieved through genes or selective breeding. Gene technology is an advanced biotechnology that can change the genetic information of organisms through precise genetic manipulation, so as to achieve the regulation of biological traits. Through genetic technology, certain genes can be selectively cut, inserted, or replaced, thus altering the genetic genes of chickens, turning their large crowns into small crowns.

In addition, selective breeding is also an effective method of Fang Qingzai. By selecting chickens with small crowns for breeding, the offspring with small crowns can be gradually screened out, so as to achieve the purpose of changing the large crown of chickens into small crowns. In short, in order to make the large crown of chickens become small crowns, it is necessary to use modern biotechnology and breeding technology to carry out genetic and selective breeding, so as to realize the regulation of chicken genes.

Is there any medication to feed the chickens.

Hello, the large crown of chickens becomes small coronatic due to the decrease in male hormone levels, and this phenomenon usually occurs in the old age of chickens. Some studies have shown that the addition of phytoestrogens to the feed can reduce the levels of male hormones, thereby promoting the shrinkage of the comb. However, this practice may have a negative impact on the health of the chickens and is therefore not recommended.

In addition, improvements in the breeding environment, such as providing ample space, clean drinking water and Qingfeng food, as well as proper exercise and rest, can also help slow the growth rate of the comb. It is important to note that any medication should be used under the guidance of a veterinarian. If you believe that the crown of the chicken is abnormal, it is recommended to consult a veterinarian for diagnosis and**.