Related Experiment Video
Updated: Jan 20, 2026
06:33
Decomposing the Variance in Reading Comprehension to Reveal the Unique and Common Effects of Language and Decoding
Published on: October 11, 2018
7.2K
Inheritance of dermatoglyphic traits in twins: univariate and bivariate variance decomposition analysis
Bibha Karmakar1, Ida Malkin, Eugene Kobyliansky
1Biological Anthropology Unit, Indian Statistical Institute, Kolkata, India. bibha@isical.ac.in
Summary
Dermatoglyphic traits show significant additive genetic influence in twins, with some traits exhibiting sex differences. Genetic correlations exist between certain finger and palm print patterns.
Area of Science:
- Human genetics
- Twin studies
- Dermatoglyphics
Background:
- Dermatoglyphic traits, patterns of fingerprints and palm prints, are heritable.
- Twin studies are crucial for dissecting genetic and environmental influences on human traits.
Purpose of the Study:
- To estimate the resemblance between monozygotic (MZ) and dizygotic (DZ) twins.
- To evaluate the mode of inheritance for various dermatoglyphic traits using variance decomposition analysis.
Main Methods:
- Maximum likelihood-based variance decomposition analysis was applied to twin data.
- Bivariate variance decomposition analysis was used to examine correlations between traits.
Main Results:
- Significant additive genetic variance was found for PII, AB_RC, RC_HB, and ATD_L in both sexes.
- Sex differences in means were significant for AB_RC and RC_HB.
- Significant genetic and residual correlations were observed between PII and RC_HB, and between AB_RC and ATD_L.
Conclusions:
- Dermatoglyphic traits are influenced by additive genetic factors.
- Specific trait pairs share genetic influences, suggesting linked genetic control or pleiotropy.
Related Concept Videos
01:21Friedman Two-way Analysis of Variance by Ranks
485
Friedman's Two-Way Analysis of Variance by Ranks is a nonparametric test designed to identify differences across multiple test attempts when traditional assumptions of normality and equal variances do not apply. Unlike conventional ANOVA, which requires normally distributed data with equal variances, Friedman's test is ideal for ordinal or non-normally distributed data, making it particularly useful for analyzing dependent samples, such as matched subjects over time or repeated measures...
485
02:17Synthesis and Decomposition Reactions
38.1K
Synthesis and decomposition are two types of redox reactions. Synthesis means to make something, whereas decomposition means to break something. The reactions are accompanied by chemical and energy changes.
38.1K
01:29Non-nuclear Inheritance
23.0K
Most DNA resides in the nucleus of a cell. However, some organelles in the cell cytoplasm—such as chloroplasts and mitochondria—also have their own DNA. These organelles replicate their DNA independently of the nuclear DNA of the cell in which they reside. Non-nuclear inheritance describes the inheritance of genes from structures other than the nucleus.
23.0K
02:08Trait and State Self-Esteem
11.4K
The term self-esteem is often used generically, to refer to how people feel about themselves. However, according to research, there are three distinct constructs that should not be used interchangeably (Brown & Marshall, 2006).
11.4K
01:18Polygenic Traits
68.9K
When more than one gene is responsible for a given phenotype, the trait is considered polygenic. Human height is a polygenic trait. Studies have uncovered hundreds of loci that influence height, and there are believed to be many more. Due to the high number of genes involved, as well as environmental and nutritional factors, height varies significantly within a given population. The distribution of height forms a bell-shaped curve, with relatively few individuals in the population at the...
68.9K
02:30Genomic Imprinting and Inheritance
36.9K
Diploid organisms inherit genetic material through chromosomes from both parents. Copies of the same gene are known as alleles. In most cases, both alleles are simultaneously expressed and allow various cellular processes to function optimally. If one of the alleles is missing or mutated, the expression of the other allele can compensate; however, this is not true for all genes.
The expression of some genes depends on which parent passed the gene to the offspring, through a phenomenon known as...
The expression of some genes depends on which parent passed the gene to the offspring, through a phenomenon known as...
36.9K