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Related Concept Videos

Traits and States01:17

Traits and States

Personality traits represent consistent patterns in behavior, thoughts, and emotions, reflecting an individual's tendencies across various situations. For example, extraversion, a well-known trait, manifests in individuals as talkative, energetic, and enthusiastic behaviors. These traits are stable over time, offering a reliable framework for predicting how people might act in different contexts. However, they do not define every moment of an individual's life. In contrast to traits, states are...
X-linked Traits01:19

X-linked Traits

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”.
X-linked Traits01:19

X-linked Traits

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”.
Multiple Allele Traits01:49

Multiple Allele Traits

The Concept of Multiple Allelism
Multiple Allele Traits01:49

Multiple Allele Traits

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Trait Centrality01:21

Trait Centrality

Trait centrality refers to the degree to which a particular characteristic influences the overall impression of an individual. Some traits exert a disproportionately strong impact on perception, shaping how people interpret other attributes of a person. Solomon Asch first systematically studied this phenomenon in 1946.Asch’s Experiment on Trait CentralityAsch's seminal study demonstrated the centrality of certain traits through a controlled experiment. Participants were presented with a list of...

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Related Experiment Video

Updated: May 29, 2026

Behavioral Tracking and Neuromast Imaging of Mexican Cavefish
14:58

Behavioral Tracking and Neuromast Imaging of Mexican Cavefish

Published on: April 6, 2019

Hunt for the hidden trait.

Vanamala Alwar1, Reeti Kavdia, Nandini Singh

  • 1Department of Clinical Pathology, St. John's Medical College Hospital, Bangalore, India.

Journal of Laboratory Physicians
|September 23, 2011
PubMed
Summary
This summary is machine-generated.

Peripheral smear examination is an effective screening tool for identifying individuals with beta-thalassemia trait (TT). This method, when carefully performed, offers high predictive value for detecting TT and other hemoglobinopathies.

Keywords:
Iron deficiency anemiaThalassemia traitperipheral smear

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Area of Science:

  • Hematology
  • Medical Diagnostics

Background:

  • Beta-thalassemia trait (TT) is a common inherited blood disorder.
  • Early and accurate screening is crucial for genetic counseling and management.

Purpose of the Study:

  • To evaluate the diagnostic efficacy of peripheral blood smear examination as a primary screening method for beta-thalassemia trait.

Main Methods:

  • Analysis of 17,623 Leishman-stained peripheral blood smears.
  • Evaluation of red blood cell indices including microcytosis and hypochromia.
  • Confirmation of suspected cases using Alkaline Hemoglobin Electrophoresis.

Main Results:

  • 60 out of 17,623 smears were identified as suspicious for TT.
  • Alkaline hemoglobin electrophoresis confirmed elevated HbA2 levels in these cases (Mean = 7.5%).
  • Five cases were identified with other hemoglobinopathies, including sickle cell trait and Hb-E.

Conclusions:

  • Peripheral smear examination demonstrates high accuracy and is an invaluable tool for screening beta-thalassemia trait.
  • A positive predictive value of 95% underscores its utility.
  • Increased awareness and counseling are recommended for peripheral healthcare centers.