Trisomy - Wikipedia
Trisomies can occur with any chromosome, but often result in miscarriage rather than live birth. For example, Trisomy 16 is most common in human pregnancies, occurring in more than 1%, but the only surviving embryos are those having some normal cells in addition to the trisomic cells (mosaic trisomy 16). [3] .
Trisomy: Types of Trisomy Disorders - Cleveland Clinic
Trisomy is a genetic condition that results in an extra copy of a chromosome. A person with trisomy will have 47 chromosomes instead of 46. Trisomy pregnancies can result in a live birth but many end prematurely in miscarriage.
Types of Trisomy: Causes and Symptoms - Verywell Health
2024年1月21日 · Trisomies are typically classified by the specific chromosome that has been affected. For instance, Down syndrome, the most common genetic disorder in humans, is referred to as trisomy 21 because there is an extra copy of chromosome 21 in the nucleus of each cell. Different trisomies have different features.
Trisomy | Description, Cause, & Examples | Britannica
trisomy, abnormality in chromosome number (aneuploidy), characterized by the existence of an extra chromosome, resulting in three copies of the affected chromosome, rather than the typical two copies. As a result, individuals with a trisomy disorder carry …
Trisomies and Monosomies | Boston Children's Hospital
Trisomies and monosomies are types of numerical chromosome abnormalities that can cause certain birth defects. Learn more from Boston Children's Hospital.
Trisomy 21 (Down Syndrome) - Children's Hospital of Philadelphia
Trisomy 21 is the most common chromosomal anomaly in humans, affecting about 5,000 babies born each year and more than 350,000 people in the United States. Also known as Down syndrome, trisomy 21 is a genetic condition caused by an extra chromosome. Most babies inherit 23 chromosomes from each parent, for a total of 46 chromosomes.
三 X 染色体综合征 - 儿童的健康问题 - 《默沙东诊疗手册大众版》
三 X 染色体综合征是一种常见的性染色体异常，其中女孩出生时带有三条 X 染色体 (XXX)。 染色体是细胞内包含 DNA 和许多基因的结构。 基因包含确定身体外观和功能的指令。 性染色体决定胎儿的性别是男性还是女性。 一对 X 和 Y 染色体 (XY) 决定性别为男性，一对 X 和 X 染色体 (XX) 决定性别为女性。 在三 X 染色体综合征中，多余的 X 染色体通常是从母亲那里遗传。 母亲的年龄越大，胎儿出现该综合征的可能性就越大。 每 1,000 名女孩中约有 1 名出生时就有第三条 X 染 …
Trisomy 18 Syndrome | Trisomy 13 Syndrome - SOFT
Trisomy 18 syndrome (Edwards syndrome) is a disorder of human chromosomes which occurs in approximately 1 in 7,000 live born infants. Trisomy refers to three copies of a chromosome instead of the normal two and in trisomy 18 there is a presence of an extra #18 chromosome. (Select a .pdf download below)
Trisomy X - MedlinePlus
Trisomy X, also called triple X syndrome or 47,XXX, is characterized by the presence of an additional X chromosome in each of a female's cells. Although females with this condition may be taller than average, this chromosomal change typically causes no unusual physical features.
trisomic - 百度百科
trisomic，英语单词，主要用作形容词，作形容词时译为“三染色体的；一套半染色体的”。 [1] In the double trisomic 3, 6, six hybridization sites were detected.在3号，6号染色体双三体上共有6个杂交位点。 Primary trisomic in barley played the important role in genetic and breeding.大麦的初级三体在遗传育种上有重要价值。