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Polygenic trait [1]
Polygenic trait refers to a trait that is controlled by multiple non-allelic genes. They are a group of genes that, when turned on, are expressed as a unit
Nevertheless, the effect of an individual gene is hard to distinguish, especially since a polygenic character involves several genes.. The resulting phenotypic character is often an intermediate of heritable characters whereas the traits at the extremes are not as frequent as the intermediates
Because of the wide range of trait variations, the possible trait outcomes cannot be easily and straightforwardly categorized into groups, e.g. into either white or black, but by a wide spectrum, such as from light to dark.
Biology Online Dictionary [2]
Definition: the kind of inheritance in which the trait is produced from the cumulative effects of many genes. Polygenic inheritance refers to the kind of inheritance in which the trait is produced from the cumulative effects of many genes in contrast to monogenic inheritance in which the trait results from the expression of one gene (or one gene pair)
Polygenic inheritance is a non-Mendelian form since it is controlled by multiple genes at different loci on different chromosomes expressed together in the same trait.. For example, if one pair of genes controls color, and red is dominant to white, then when you cross two heterozygotes (Aa), red and white progeny will appear in the ratio of 3:1
This is a modification of the typical dihybrid Mendelian ratio of 9:3:3:1, in which three of the progeny groups all have the same phenotype.. What is polygenic inheritance? Polygenic inheritance, in simple terms, implies a character or phenotypic trait, which is regulated by more than one gene
How do genes determine eye color? [3]
Human eyes are fascinating – just take a look at the many different shades of eye color and the intricate, unique iris patterns from all over the world. What we call eye color is actually the color of the iris
For example, as light travels through a relatively melanin-free iris, collagen fibers within the iris scatter the short blue light to the surface creating the blue appearance of the iris. In fact, iris color exists in a gradient of shades and color patterns: from the lightest shades of blue to the darkest browns and everything in between
In addition to color, the fibrous tissue in the iris also forms a unique pattern in each individual’s eyes. Just like one’s fingerprints, an iris pattern can be used for biometric identification
Which of the following is an example of polygenic traits?-Turito [4]
Which of the following is an example of polygenic traits?. The Human height and flower color in peas are two traits that are influenced by two or more genes, such as height or skin tone, and are referred to as polygenic traits.
Because of this, a tall person would have all the dominant alleles, whereas a small person would have the majority of the recessive alleles.. – While the color of the pea flower is determined by two separate genes, the inheritance of human skin color is an example of polygenic inheritance or multi-gene inheritance
– Two genes- a dominant and recessive gene for violet and a recessive gene for white control the inheritance pattern in the garden pea (Pisum sativum) flower.. – Garden pea flower color inheritance is a good example of true inheritance since it results in dominant violet-colored blooms in one generation while expressing both dominant and recessive features in the next.
Biology Online Dictionary [5]
Definition: the kind of inheritance in which the trait is produced from the cumulative effects of many genes. Polygenic inheritance refers to the kind of inheritance in which the trait is produced from the cumulative effects of many genes in contrast to monogenic inheritance in which the trait results from the expression of one gene (or one gene pair)
Polygenic inheritance is a non-Mendelian form since it is controlled by multiple genes at different loci on different chromosomes expressed together in the same trait.. For example, if one pair of genes controls color, and red is dominant to white, then when you cross two heterozygotes (Aa), red and white progeny will appear in the ratio of 3:1
This is a modification of the typical dihybrid Mendelian ratio of 9:3:3:1, in which three of the progeny groups all have the same phenotype.. What is polygenic inheritance? Polygenic inheritance, in simple terms, implies a character or phenotypic trait, which is regulated by more than one gene
Polygenic Trait [6]
A polygenic trait is a characteristic, such as height or skin color, that is influenced by two or more genes. Because multiple genes are involved, polygenic traits do not follow the patterns of Mendelian inheritance
As we’ve gotten better at identifying regions of the human genome that are associated with disease and at analyzing complicated genomic data, we’ve learned that the genetic component of many of the most important health conditions of our time — cancer, heart disease, diabetes — are due to the effects of multiple genes. This has been a fascinating area of study, as scientists have begun to study these conditions and realized that the ways that we have of predicting risks for polygenic traits have tremendous potential for improving human health.
Which one of the following is an example of polygenic inheritance? [7]
Polygenic inheritance occurs when one character is controlled by two or more genes. Often the genes are large in number but small in effect
The pink flower colour in Mirabilis jalapa is an example of incomplete dominance while production of male honey bees is an example of parthenogenesis.
Polygenic Traits – Definition and Examples [8]
Polygenic traits are traits that are controlled by multiple genes instead of just one. The genes that control them may be located near each other or even on separate chromosomes
Instead of being measured discretely, they are often represented as a range of continuous variation. Some examples of polygenic traits are height, skin color, eye color, and hair color.
A trait is any feature of an organism, such as eye color. A phenotype is the set of an organism’s physical characteristics
Which one of the following best describes polygenic inheritance?A. ABO blood group in human and flower color of Mirabilis jalapaB. Hair pigment of mouse and tongue rolling in humanC. Human eye color a [9]
Which one of the following best describes polygenic inheritance?. ABO blood group in human and flower color of Mirabilis jalapa
Polygenic inheritance occurs when one character is controlled by two or more genes. The genes are often large in quantity but small in effect.
Codominance is a phenomenon in which alleles that do not show dominance recessive relationships are able to express themselves independently when present together. In incomplete dominance, the genes of an allelomorphic pair are not expressed as dominant and recessive but express themselves partially when present together in the hybrid
What is polygenic inheritance? + Example [10]
Polygenic inheritance means a character which is controlled by more than two genes.. A character or an allele is specially controlled by 1 pair of a gene.Like in Mendel examination the height of pea plant is controlled by 1 pair of a gene
Its a perfect example of polygenic inheritance.Because it is controlled by 3pair of a gene. Nilson-Ehle first described the polygenic inheritance.Moreover human eye colour, weight and height also an example of polygenic inheritance
Polygenic inheritance is also known as quantitative inheritance and refers to a single inherited phenotypic trait that is controlled by two or more different genes.. It refers to inheritance of a phenotypic characteristics (traits) that is attributable to two or more genes and can be measured quantitatively
Polygenic Inheritance [11]
This set of Biology Multiple Choice Questions & Answers (MCQs) focuses on “Polygenic Inheritance”.. Explanation: Through the experiments of pea conducted by Mendel, he described distinct contrasting traits such as flower colour which are either purple or white.
Traits which are generally controlled by three or more genes are known as polygenic traits.. Which of the following is a classic example of polygenic inheritance?
Explanation: Height of humans is a polygenic trait and is therefore not limited to only tall and short people. Instead of two distinct alternative traits, a range of all the possible heights is present in a human population.
Sources
- https://www.biologyonline.com/dictionary/polygenic-trait#:~:text=In%20humans%2C%20height%2C%20skin%20color,are%20examples%20of%20polygenic%20traits.
- https://www.biologyonline.com/dictionary/polygenic-inheritance#:~:text=What%20are%20polygenic%20inheritance%20examples,the%20examples%20of%20polygenic%20inheritance.
- https://www.gbhealthwatch.com/Trait-Eye-Color.php#:~:text=Genetic%20determination%20of%20eye%20color,is%20determined%20by%20multiple%20genes.
- https://www.turito.com/ask-a-doubt/Biology-which-of-the-following-is-an-example-of-polygenic-traits-widows-peak-attached-earlobes-flower-color-in-pe-qdb9fefb3
- https://www.biologyonline.com/dictionary/polygenic-inheritance
- https://www.genome.gov/genetics-glossary/Polygenic-Trait
- https://byjus.com/question-answer/which-one-of-the-following-is-an-example-of-polygenic-inheritance-flower-colour-in-mirabilis/
- https://biologydictionary.net/polygenic-traits/
- https://www.vedantu.com/question-answer/which-one-of-the-following-best-describes-class-12-biology-cbse-5fe9a83107b31068310e83e9
- https://socratic.org/questions/what-is-polygenic-inheritance-1
- https://www.sanfoundry.com/biology-questions-answers-polygenic-inheritance/
