sex Learn more about sex
-
Sex chromosome difference and Origin of Snake
The sex of the snake is determined by the sex chromosome and belongs to the ZZ/ZW mechanism. In order to study the origin and evolution of snake sex chromosomes, KazumiMatsubara, a researcher at the Creative Scientific Research Institute (CreativeResearch.InitiativeSousei,CRIS) of Hokkaido University in Japan, identified Japanese four-stripedrat snake (Elaphequadrivirg) by fluorescence in situ hybridization (fish).
2019-01-16 -
Methods of controlling the sex of fish
Controlling the sex of fish is an effective way to increase fish yield. In general, the use of sex hormones can induce the sex of fish to develop in the desired direction. There are two kinds of sex hormones, testes secrete androgens, ovaries secrete estrogen. The primitive reproductive epithelium of fish has two components of the medulla that determine the development to female and male. Under the action of estrogen, the cortex becomes ovary, the medulla is undeveloped and the female has the function of spawning and reproduction; on the contrary, under the action of androgen, the fish will become male. Therefore, in the hair
2019-01-15 -
Psychological test: choose one of your favorite pot plants to test how attractive you are to the opposite sex?
For girls, no matter what your character is, there is some comparison psychology, sometimes in dress and makeup, but sometimes in the attraction of the opposite sex. No matter how you feel about yourself, everyone wants it.
2018-05-29 -
Chinese scientists reveal the Mystery of Sex determination of Cucumber
Chinese scientists reveal the Mystery of Sex determination of Cucumber
2019-02-18 -
The method of sex discrimination of ducks
The method of sex discrimination of ducks
2018-07-04 -
Instructions for the use of Inger sex attractant products
Instructions for the use of Inger sex attractant products
2018-07-25 -
The method of turning the anus for sex identification of chicks
The method of turning the anus for sex identification of chicks
2018-07-01 -
Sex pheromones are super easy to use, why are they expensive and out of stock? The reason why it is difficult to import but unable to MIT is exposed
Sex pheromones are super easy to use, why are they expensive and out of stock? The reason why it is difficult to import but unable to MIT is exposed
2020-11-16 -
My love growing flowers has nothing to do with sex, age and identity.
Every time I post a picture on moments, someone will say, "Why did you retire so early?" It seems that growing flowers and vegetables is exclusive to the elderly, but today, I want to say aloud: I love growing flowers, which has nothing to do with gender, age and identity! I have 4 around me.
2018-09-12 -
Lack of nutrition or sex hormones, non-estrus or infertility and management.
Lack of nutrition or sex hormones, non-estrus or infertility and management.
2018-07-23 -
Autumn military insect control QA02 "is it appropriate for farmers to buy pheromones to catch insects?" Does it have native predators?
Autumn military insect control QA02 "is it appropriate for farmers to buy pheromones to catch insects?" Does it have native predators?
2019-06-23 -
Physical control of vegetable pests is effective.
Physical control of vegetable pests is effective.
2018-07-11 -
Key points of field application of insect pheromone trapping method
Key points of field application of insect pheromone trapping method
2018-07-25 -
Introduction to insect pheromone knowledge
Introduction to insect pheromone knowledge
2018-07-25 -
Tea sex line breeding
The sexual offspring of tea plant are produced by the combination of male and female cells, and a breeding method of new varieties is developed through selection. A variety bred is called a sexual variety. The method is: 1. Selection of superior individual plant or type: single plant selection or group selection from the original material nursery or production tea garden according to breeding objectives; 2. Seed collection and seedling raising: for the primary selected individual plant or group, the seeds were collected respectively, and the seedlings were raised according to the system, and the seedling characters and variety purity were identified. Family or group comparison trial: compare selected families or groups with controls
2019-01-16 -
Gecko culture base: are there any points for attention in gecko breeding? is gecko breeding illegal? Sex identification of gecko
What are the points for attention in gecko culture?
2019-03-02 -
An isotropic tube for the control of meat insects
An isotropic tube for the control of meat insects
2019-02-20 -
Integrated control techniques of small heart borer in pear orchard for export
Integrated control technology of small heart borer in exported pear orchard in recent years, the area of pear orchard at Botou export has been expanding, but with the prohibition of organophosphorus pesticide and the restriction of chlorpyrifos, and a large number of unreasonable use of drugs lead to pest resistance.
2018-06-06 -
What kind of chicken likes to lay eggs? High quality and high yield laying hen breed
In rural areas, most families will raise chickens, and the sparsely populated rural areas are also more suitable for raising poultry. General chicken farmers hope that chickens can lay more eggs, their own enough to eat at the same time, but also can sell money is the best. Which breeds of chickens like to lay eggs? What are the high quality and high yield laying hens?
2020-11-27 What product breeder love laying high quality high yield laying hen breed -
Ginkgo trees are also divided into male and female, and these methods teach you how to distinguish the sex of ginkgo trees.
Many people do not know that ginkgo trees are male and female. In fact, many plants are dioecious, such as kiwifruit, spinach, iron tree, etc., among which ginkgo trees are also dioecious. So many people will ask why their ginkgo trees.
2018-05-19