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What is meant by Polygenetic?
1 : polyphyletic. 2 : having many distinct sources.
What are Polygenes examples?
Polygenic trait refers to a trait that is controlled by multiple non-allelic genes. These genes are called polygenes. In humans, height, skin color, hair color, and eye color are examples of polygenic traits. Type-2 diabetes, coronary heart disease, cancer, and arthritis are also deemed as a polygenic.
What does polygenic inheritance refer to?
the heredity of complex characters that are determined by a large number of genes, each one usually having a relatively small effect.
What is monogenic and polygenic?
A monogenic trait is a trait produced by the effect of a gene or an allele. It is in contrast to a polygenic trait that is controlled by a polygene (multiple genes). Since the trait is produced by a single gene or allele it is less complicated compared with the trait produced by a polygene.
What are polygenes Mcq?
Explanation: Genes which are involved in quantitative inheritance are called as polygenes.
What do you mean by Pleiotropism?
Pleiotropism is the condition in which a single gene controls more than one phenotypic effect, that is completely unrelated. E.g.: Phenylketonuria. It is an autosomal recessive disorder affecting chromosome number 12.
What is polygenic inheritance give an example class 12?
(a) Polygenic inheritance is an inheritance pattern controlled by three or more genes (multiple genes) and the graded phenotypes are due to the additive or cumulative effect of all the different genes of the trait. An example of human skin colour to understand the phenomenon of polygenic inheritance.
What is an example of a monogenic trait?
Monogenic disorders (monogenic traits) are caused by variation in a single gene and are typically recognized by their striking familial inheritance patterns. Examples include sickle cell anemia, cystic fibrosis, Huntington disease, and Duchenne muscular dystrophy.
What does polygenetic mean?
polygenetic(Adjective) Of or pertaining to polygenesis; polyphyletic. polygenetic(Adjective) One which is composite, or consists of two or more monogenetic ranges, each having had its own history of development.
What does polygenic disorder mean?
Polygenic disease: A genetic disorder that is caused by the combined action of more than one gene . Examples of polygenic conditions include hypertension, coronary heart disease, and diabetes. Because such disorders depend on the simultaneous presence of several genes, they are not inherited as simply as are single-gene diseases.
What is the definition of polygenic?
• POLYGENIC (adjective) The adjective POLYGENIC has 1 sense: 1. of or relating to an inheritable character that is controlled by several genes at once; of or related to or determined by polygenes. Familiarity information: POLYGENIC used as an adjective is very rare.