What is a multifactorial characteristic?
What is multifactorial inheritance? Multifactorial inheritance is when more than one factor causes a trait or health problem, such as a birth defect or chronic illness. The main factor is genes. But the cause includes other factors that aren’t genes, such as: Nutrition.
What are some examples of multifactorial traits?
Examples of Multifactorial Traits: Fingerprint patterns, height, eye color, and skin color… Eye color: iris colored by the pigment — melanin. Blue eye: just enough melanin, dark blue or green, brown, or black eyes, make increasingly more melanin in the iris.
Which is an example of a multifactorial polygenic trait?
For example, height is thought to be polygenically inherited, but a person’s stature also is significantly affected by adequacy of diet while growing. Cleft lip with or without cleft palate is probably an example of a polygenic trait with a threshold effect. Its incidence in the general population is about 1/1000.
What is multiple alleles give an example?
The major example of multiple allelism is ABO blood grouping in humans. Complete answer: Multiple alleles refer to the occurrence of three or more than three alleles for a particular gene. Allele A codes for antigen A, Allele B codes for antigen B, and Allele O codes for the absence of antigen.
What does multifactorial mean?
Definition of multifactorial 1 : caused or marked by a polygenic mode of inheritance dependent on a number of genes at different loci The essence of multifactorial (polygenic) inheritance is that a single component of the phenotype (a single character) can be controlled by several independent gene loci.—
What is Unifactorial inheritance?
1 : having or being characters or a mode of inheritance dependent on genes at a single genetic locus.
What is a polygenic multifactorial trait?
Polygenic Trait The inheritance of polygenic traits does not show the phenotypic ratios characteristic of Mendelian inheritance, though each of the genes contributing to the trait is inherited as described by Gregor Mendel. Many polygenic traits are also influenced by the environment and are called multifactorial.
What is the difference between an allele a gene and a locus?
The short answer is that an allele is a variant form of a gene. Explained in greater detail, each gene resides at a specific locus (location on a chromosome) in two copies, one copy of the gene inherited from each parent. The copies, however, are not necessarily the same.
What is linkage and recombination Class 12?
In linkage, two or more genes linked together are always inherited together in the same combination for more than two generations, whereas in recombination the genetic material is exchanged between different organisms which leads to the production of offsprings with the combination of traits.
What is multifactorial approach?
A multifactorial falls risk assessment aims to identify a person’s individual risk factors for falling. This will enable practitioners to refer the person for effective interventions targeted at their specific risk factors, with the aim of reducing subsequent falls.
What does multifactorial nature mean?
For example, traits and conditions that are caused by more than one gene occurring together are multifactorial, and diseases that are caused by more than one factor interacting (for example, heredity and diet in diabetes) are multifactorial.
Which is the best definition of the word multifactorial?
adjective Referring to the influence of multiple factors in the aetiology of a particular disease (e.g., diabetes, hypertension), attributable to genetic and environmental components. adjective Referring to a phenotype caused by more than two genes.
What do you mean by multifactorial inheritance?
Multifactorial inheritance refers to disorders caused by multiple genes and environmental factors.
Which is an example of a multifactorial trait?
Hypertension is a multifactorial trait resulting from the combination of environmental and genetic factors. Several polymorphisms of candidate genes that are linked to hypertensive phenotypes have been identified (Benetos et al., 1996; Bonnardeaux et al., 1994; Davies et al., 1994).
How are multifactorial diseases related to genetic factors?
Abstract. Multifactorial diseases are caused by multiple genetic and environmental factors. The study of multifactorial disease involves several steps, including determination of disease heritability, segregation analysis to determine the genetic model, linkage or association mapping to identify genetic loci underlying the disease,…