Respuesta :
Answer;
The polygenic trait appeared as incomplete dominance.
Explanation;
-Polygenic inheritance occurs when one characteristic is controlled by two or more genes. Often the genes are large in quantity but small in effect. Examples of human polygenic inheritance are height, skin color, eye color and weight.
-Incomplete dominance is a form of intermediate inheritance in which one allele for a specific trait is not completely expressed over its paired allele. This results in a third phenotype in which the expressed physical trait is a combination of the phenotypes of both alleles.
The potential confusion in the early research was that the polygenic trait appeared as the incomplete dominance. Hence, option A is correct.
Further Explanation:
Polygenic inheritance takes place when one trait is managed by two or more genes. Often these genes are huge in quantity, however, small in effect. For instance, human polygenic inheritance include eye color, height, skin color, and weight. Polygenes are found in other living organisms also. This is also known as multiple gene inheritance. The genes responsible for causing type 2 diabetes are known to be mostly polygenes.
Incomplete dominance occurs when the dominant allele or form of the gene which does not fully masks the effects of recessive allele and displays the blending of both alleles in physical appearance. This is also called as partial or semi-dominance. The common example of this is observed in roses. The red color works as a dominant trait while recessive trait is white. However, the heterozygous roses are pink. Incomplete dominance occurs when a novel offspring is generated which does not have the features of both the parents and it provides only one traits and not many traits. Hence, it displays about the potential confusion found in early research of the inheritance patterns for skin color.
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Answer Details:
Grade: High school
Subject: Biology
Chapter: Genetics and Inheritance
Keywords:
Inheritance, incomplete dominance, complete dominance, polygenic trait, multiple gene inheritance, polygenes, skin color, height, early studies, potential confusion.
