[World Blood donor day] Is the twin blood type the same?

Author:Shenyang hygiene Time:2022.06.14

【Introduction】

June 14, 2022 is the 19th World Blood donor day. According to the official announcement of the World Health Organization, the slogan of the activity of the World Blood Donation Day in 2022 is: "Blood donation is a kind of unity. Join us and save lives." The goal of the event is: "Thanks to the world's unpaid blood donors, so that more public recognizes the significance of regularly participating in free blood donation; emphasizes the need to insist on blood donation of free blood and safe supply of blood and safe supply; The public is widely supported and participated in free blood donation. "

Twins refer to two fetuses in the mother's child, which are called twins. Twins can generally be divided into different ovulation twins and heterolar twins.

The twins of the same ovulation originated from the same fertilized eggs. The product of ovulation after fertilization was not immediately differentiated. Instead, it developed into two individuals, and the two bodies had exactly the same genome. Therefore, gender, blood types are the same, appearance, personality characteristics, and IQ are almost exactly the same, and even certain physiological characteristics and susceptibility to disease are consistent.

The twins of the heterogeneous twins are the twins formed by two eggs at the same time or almost at the same time. The genetic relationship between the two individuals is the same as the relationship between the brothers and sisters of the compatriots. Therefore, the gender of the twins is not necessarily the same. In terms of appearance and personality characteristics, it is no different from ordinary brothers and sisters. The twins of the heterogeneity are just ordinary siblings. Blood types may be different. For example, dragon and phoenix tires are typical heterolar twins.

In special cases, the twins of the heterogeneity will have congenital chimeric. The chimeric means that due to the intersect of the placenta blood vessels between the twins, the hematopoietic stem cells entered the opponent's body via the via the vascular pathway. After the heterolar twins are separated from each other, on the basis of obtaining sex immune tolerance, the implanted hematopoietic stem cells can be proliferated for a long time in the new host, resulting in a mature cells that cause mature hematopoietic stem cells (but only only Limited to the hematopoietic cell line, the cells of the substantive tissue organs are rare). Due to two types of blood -making stem cells, chimeric can show two types of blood types. In the ABO blood type identification, two types of red blood cells can be detected at the same time, and the mixed condensed appearance may occur. Organization reflects that the blood type inheritance often does not conform to the classic genetic laws. All blood type systems (such as ABO blood type systems, P systems, Kidd, and Duffy systems, etc.) can exist in all blood type systems in individuals.