Heterozygous
Heterozygous - Related Videos
12:04
Engineering Oncogenic Heterozygous Gain-of-Function Mutations in Human Hematopoietic Stem and Progenitor Cells
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Cited by 5 •
2023
Novel strategies to faithfully model somatic mutations in hematopoietic stem and progenitor cells (HSPCs) are necessary to better study hematopoietic stem cell biology and hematological malignancies. Here, a protocol to model heterozygous gain-of-function mutations in HSPCs by combining the use of CRISPR/Cas9 and dual rAAV donor transduction is described.
01:49
Probability Laws
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2019
Overview The probability of inheriting a trait can be calculated using the sum and product rules. The sum rule is used to calculate the probability of mutually exclusive events. The product rule predicts the probability of multiple independent events. These probability rules determine theoretical probability—the likelihood of events occurring before they happen. Empirical probability, by contrast, is calculated based on events that have already occurred. The Sum and Product Rules Are...
10:17
An Allele-specific Gene Expression Assay to Test the Functional Basis of Genetic Associations
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Cited by 2 •
2010
Genetic associations often remain unexplained at a functional level. This method aims to assess the effect of phenotype-associated genetic markers on gene expression by analyzing cells heterozygous for transcribed SNPs. The technology allows accurate measurement by MALDI-TOF mass spectrometry to quantify allele-specific primer extension products.
03:34
Assessing Social Dominance in Mouse Models Using the Tube Test
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Cited by 1 •
2025
This protocol describes a behavioral assay to evaluate social dominance in rodents using the tube test. Social dominance remains stable over time, and several models of developmental and neurological disorders exhibit robust social dominance abnormalities. Therefore, the tube test serves as a convenient outcome measure for mechanistic studies or preclinical therapeutic screening.
08:43
Microinjection of Interleukin-6 into the Bloodstream of TSC Zebrafish Larvae to Study Neuropsychiatric Disorder-Like Behaviors
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2026
To model how inflammatory signals influence neurodevelopment in genetically susceptible organisms, we present a protocol for microinjecting IL-6 into the duct of Cuvier (common cardinal vein) of zebrafish larvae, enabling controlled induction of inflammation and assessment of its developmental impact in the context of tuberous sclerosis complex (TSC).
FAQs
The observable effect of a heterozygous genotype depends on how its two alleles interact. Under dominance, one allele determines the expressed trait, whereas the other may not be apparent in the phenotype. This distinction matters because the genotype can preserve an allele that remains biologically relevant even when its effect is not visibly expressed.
With incomplete dominance, the heterozygous state can produce an expression intermediate between the effects associated with the two alleles. Codominance differs because both allele-associated expressions appear rather than blending into one intermediate outcome. Recognizing these patterns prevents researchers from treating every heterozygous genotype as evidence that one allele masks the other.
For a recessive condition, a heterozygous individual may carry the allele associated with the condition without expressing the corresponding trait. That makes heterozygosity important in inheritance analysis: a person’s genotype can have consequences for offspring even when the condition is not apparent in that individual. This distinction helps explain how recessive conditions can be inherited.
Different allele combinations at the same gene can create variation among individuals, and heterozygous genotypes are one important form of that variation. At the population level, their presence helps explain genetic diversity rather than focusing only on which single trait is expressed. This perspective connects individual inheritance patterns with broader patterns of population diversity.
Genetic crosses organize the allele combinations contributed by each parent and use those combinations to predict possible offspring outcomes. For a heterozygous parent, the analysis must account for the fact that the parent carries two different alleles, while the expected trait depends on their interaction in the offspring. Such crosses connect genotype patterns with predicted expression.
Interpretation should distinguish the presence of a variant from its expression and from the inheritance pattern involved. A heterozygous genotype may be relevant to disease risk, particularly when the allele is associated with a recessive condition, but the observed effect also depends on whether dominance, incomplete dominance, or codominance applies. This framework supports more careful variant interpretation.