What is a recessive disease and what is a hidden disease?

Some people have certain recessive pathogenic genes -- when there is a dominant gene a, they do not exhibit traits, and when a man and a woman carry a recessive pathogenic gene a at the same time and pass it on to the next generation at the same time, then the next generation will carry the gene aa and exhibit recessive gene traits Such a disease is called a recessive disease.

There are no clinically symptomatic diseases.

Recessive traits are parental traits that are not represented in the offspring produced by the crossing of parents with relative traits.

A recessive trait, abbreviated as recessive, is defined as a parental trait that does not appear in a child generation when two homozygous parents with relative traits are crossed. Mendel called the parental trait manifested in F1 the dominant trait. In Mendel's hybrid experiments, whether white flowers were used as the paternal parent and safflower as the female parent, or safflower as the male parent and white flowers as the female parent, all the plants of the offspring generation had red flowers, and there were no white flowers or other colored flowers.

Safflower is a dominant trait relative to white flowers, as safflower manifests itself in the offspring.

The opposite of the recessive trait is the dominant trait, the dominant trait, the homozygous parent with a pair of relative traits is crossed, the child generation is heterozygous, and one of the corresponding alleles has a significant effect on the trait exhibited, and the other does not exhibit for the time being. The trait of the parent that is exhibited is the dominant trait.

Parental traits with relative traits that are not manifested in the offspring after crossing. Relative traits, on the other hand, refer to the differences in the performance of the same unit trait among different individuals. The traits that are manifested in the offspring are called dominant traits, and the traits that are not manifested are called recessive traits.

Two purebred parents with relative traits are crossed, and F1 does not exhibit the traits of that parent.

Originally refers to certain diseases that are located on the surface of the body and are not exposed to clothing; Hidden diseases later refer to diseases that are inconvenient to tell people (such as venereal diseases).

Hidden disease pronunciation. yǐn jí]

Definition [unmentionable disease] originally refers to certain diseases that are located on the surface of the body and are not exposed to clothing; Hidden diseases later refer to diseases that are inconvenient to tell people (such as venereal diseases).

The name is not based on the country, not the sun and the moon, not the hidden disease, not the mountains and rivers. - The Book of Rites: Qu Li. Note: "Hidden disease, the disease in the clothes, is also said to be like a black buttocks, black humerus." ”

Physical illness that is not easy to see or that cannot be told motives. The Book of Rites Qu Lishang: Those who are famous are not based on the country, not the sun and the moon, not with hidden diseases, not with mountains and rivers. Also known as dark disease.

Explain in detail. The Book of Rites Qu Lishang: Those who are famous are not based on the country, not the sun and the moon, not with hidden diseases, not with mountains and rivers. Zheng Xuan Note:

Hidden diseases, diseases in clothes. It is said to be like a black buttocks and a black humerus. Kong Yingda Shu:

Diseases of the hidden places of the body. Later, the term "hidden disease" refers to diseases that are inconvenient to tell, such as venereal diseases, heavenly eunuchs, and the like.

Ming Shen Defu "Ye Hou Supplement Zhenxiang Not a Male": "Emperor Haixi of the Jin Dynasty has a hidden disease, the people of Wuyang Hou Fan City of the Han Dynasty cannot be a man, the Yuan and Wei Dynasty are not males, and the Northern Qi Linzhang Order Li Shuzhi is a heavenly eunuch. Qing Pu Songling, "Liao Zhai Zhiyi, Li Xiangxian":

Born with a hidden disease, he began to move in a few months; When he moved, he got up quickly, ignoring the guests, and called in from outside, so the maid avoided it. Ye Shengtao's "Ni Huanzhi" nine: "Sanfu was originally 'unable to learn books' and went to learn gymnastics, and when he heard the words of this commenting article, it was like someone else asking about his hidden illness, and he couldn't help but blush again. ”

It is also called dark disease, which originally refers to certain diseases that are located on the surface of the body and are not exposed to clothing; Hidden diseases later refer to diseases that are inconvenient to tell people (such as venereal diseases).

The name is not based on the country, not the sun and the moon, not the hidden disease, not the mountains and rivers. - The Book of Rites: Qu Li. Note: "Hidden disease, the disease in the clothes, is also said to be like a black buttocks, black humerus." ”

It also describes potential hidden dangers.

Hidden diseases generally refer to major diseases.

A pair of [homozygous] parents with [relative traits] are crossed, and the offspring generation is heterozygous.

The traits exhibited by the offspring are the same as those of [one of] the parents, which are called [dominant traits], and the genes of that parent are defined as [dominant genes].

Then the trait of the other parent is the recessive trait, and its gene is the recessive gene.

This is how scientists define "explicit" and "implicit". If you still can't understand it, I'll give you an example:

Two rabbits (both homozygous), one with white fur and the other with black fur. After mating, the rabbits born are all [white].

Then scientists define [white hair] as the dominant trait, and homozygous dominant genes as AA.

Black hair] is a recessive trait (because the rabbit born does not have black hair, of course, "black" is "hidden"), and the homozygous recessive gene is AA.

There is no special genotype, but it is divided into autosomal dominant recessive and sex chromosome dominant recessive, dominant venereal disease means that as long as there is this disease-causing gene, the organism will manifest the disease;

Recessive disease means that if the pathogenic gene is on the autosome, it needs to be present on a pair of chromosomes in the homologous staining to contain the disease-causing gene, and there is no dominant wild-type gene, and the disease will manifest as a disease;

If the recessive disease is of the sex chromosome (X or Y) type, if it is on the X chromosome, then the disease-causing gene is on both X chromosomes in the female body, and the disease will occur in the male because there is only one X chromosome in the body, so as long as it is a male; If the disease-causing gene is on the Y chromosome, it is not dominant and recessive, and the male will definitely develop the disease.

Hope, thank you.