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Related Concept Videos

Lethal Alleles02:41

Lethal Alleles

Agouti: A Lethal Allele
Lucien Cuénot discovered lethal alleles in 1905 while studying the inheritance of coat color in mice. The agouti gene is responsible for the color of the coat in mice. This gene codes for an agouti-signaling protein, which is responsible for melanin distribution in mammals. The wild-type allele gives rise to gray-brown coat color in mice, while the mutant allele gives rise to yellow coat color. In addition to coat color, the agouti gene is associated with the yellow...
Incomplete Dominance01:43

Incomplete Dominance

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.
Background and Environment Affect Phenotype02:27

Background and Environment Affect Phenotype

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...
Pleiotropy01:33

Pleiotropy

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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Genetic Lingo

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Pedigree Analysis01:35

Pedigree Analysis

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Related Experiment Video

Updated: Jun 28, 2026

A Reverse Genetic Approach to Test Functional Redundancy During Embryogenesis
06:59

A Reverse Genetic Approach to Test Functional Redundancy During Embryogenesis

Published on: August 11, 2010

Human phenotypes associated with GATA-1 mutations.

Wendy A Ciovacco1, Wendy H Raskind, Melissa A Kacena

  • 1Department of Orthopaedics and Rehabilitation, Yale University School of Medicine, New Haven, CT, USA.

Gene
|October 22, 2008
PubMed
Summary
This summary is machine-generated.

Mutations in the GATA-1 gene disrupt normal blood cell formation, leading to serious diseases like X-linked thrombocytopenia and leukemia. Understanding these GATA-1 gene mutations is key for developing new therapies.

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Area of Science:

  • Genetics
  • Hematology
  • Molecular Biology

Background:

  • GATA-1 is a crucial transcription factor for normal human hematopoiesis.
  • Mutations in GATA-1 are linked to various blood cell disorders.
  • Recent research has clarified the role of GATA-1 in blood cell development.

Purpose of the Study:

  • To review the functional consequences of GATA-1 mutations.
  • To link specific GATA-1 gene errors to human diseases.
  • To highlight the genotype-phenotype correlations of GATA-1 mutations.

Main Methods:

  • Literature review of GATA-1 mutations and associated diseases.
  • Analysis of functional consequences of GATA-1 gene errors.
  • Correlation of specific mutations with clinical phenotypes.

Main Results:

  • GATA-1 mutations are associated with five distinct human diseases: X-linked thrombocytopenia (XLT), X-linked thrombocytopenia with thalassemia (XLTT), congenital erythropoietic porphyria (CEP), transient myeloproliferative disorder (TMD), and acute megarakaryoblastic leukemia (AMKL) associated with Trisomy 21.
  • A specific anemia subtype is linked to a shortened GATA-1 isoform (GATA-1s).
  • Phenotypic diversity illustrates GATA-1's integral role in homeostasis.

Conclusions:

  • GATA-1 mutations have significant clinical implications, affecting blood cell lineage formation.
  • Understanding genotype-phenotype correlations of GATA-1 is vital for potential therapeutic strategies.
  • Further research into the human genome and GATA-1 function may lead to novel treatments.