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相关概念视频

Background and Environment Affect Phenotype02:27

Background and Environment Affect Phenotype

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Although the genetic makeup of an organism plays a major role in determining the phenotype, there are also several environmental factors, such as temperature, oxygen availability, presence of mutagens, that can alter an organism’s phenotype.
An example of how genetic background affects phenotype can be seen in horses. The Extension gene in horses is responsible for their coat color. A wild-type gene (EE) produces black pigment in the coat, while a mutant gene (ee) produces red pigment. A...
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Incomplete Dominance01:43

Incomplete Dominance

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Gregor Mendel's work (1822 - 1884) was primarily focused on pea plants. Through his initial experiments, he determined that every gene in a diploid cell has two variants called alleles inherited from each parent. He suggested that amongst these two alleles, one allele is dominant in character and the other recessive. The combination of alleles determines the phenotype of a gene in an organism.
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Pleiotropy is the phenomenon in which a single gene impacts multiple, seemingly unrelated phenotypic traits. For example, defects in the SOX10 gene cause Waardenburg Syndrome Type 4, or WS4, which can cause defects in pigmentation, hearing impairments, and an absence of intestinal contractions necessary for elimination. This diversity of phenotypes results from the expression pattern of SOX10 in early embryonic and fetal development. SOX10 is found in neural crest cells that form melanocytes,...
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X-linked Traits

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In most mammalian species, females have two X sex chromosomes and males have an X and Y. As a result, mutations on the X chromosome in females may be masked by the presence of a normal allele on the second X. In contrast, a mutation on the X chromosome in males more often causes observable biological defects, as there is no normal X to compensate. Trait variations arising from mutations on the X chromosome are called “X-linked”.
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相关实验视频

Updated: Jan 16, 2026

Navigating MARRVEL, a Web-Based Tool that Integrates Human Genomics and Model Organism Genetics Information
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14点的GATA2:基因型-表型相关性

Amy P Hsu1, Subrata Paul2, Jennifer L Kwan3

  • 1Laboratory of Clinical Immunology and Microbiology, NIAID/NIH, Bethesda, MD. twins@niaid.nih.gov.

Haematologica
|January 15, 2026
PubMed
概括

GATA2突变导致骨髓衰竭. 特定的突变类型,如切断和Null等位基因,导致更早的症状发作和更高的骨髓性恶性瘤风险.

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科学领域:

  • 血液学 血液学 血液学
  • 遗传学 是一个遗传学.
  • 在瘤学瘤学.

背景情况:

  • GATA2突变是已知的成人开始骨髓衰竭的原因之一.
  • 这些突变与细胞衰竭,感染以及骨髓性恶性瘤的风险增加有关.

研究的目的:

  • 研究不同GATA2突变类型之间的相关性及其对造血和综合征特征的影响.
  • 为了确定特定的GATA2突变类别是否会影响症状发病的年龄和骨髓质恶性瘤的风险.

主要方法:

  • 对222个具有GATA2突变的家庭中的232个人的医院记录和转诊的回顾性审查.
  • 根据它们对GATA2蛋白的作用对突变的分类:C-终端,指2 (ZF2) 误解,截断,Null等位基因和Enhancer突变.
  • 应用回归模型来分析不同突变组和特定ZF2氨基酸变化的症状发作和危险比率 (HR).

主要成果:

  • 与增强基因突变相比,对切断 (13年,HR 5.00),零基因 (17年,HR 3.60) 和ZF2突变 (22年,HR 2.23) 观察到较早的症状发作和增加的危险比率.
  • 与R398 (34年) 相比,特定的ZF2突变R396和T354与较早的发病 (16年,HR 2.96;19年,HR 2.16) 相关.

结论:

  • GATA2突变的类型和位置显著影响临床表现,包括发病年龄和相关风险.
  • 了解这些基因型-表型相关性对于预测疾病进展和管理与GATA2相关的骨髓衰竭综合征患者至关重要.