How polygenic traits produce the appearance of blending inheritance

Running Head : How polygenic traits produce the appearance of blending inheritance

Appearance of blending inheritance

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Introduction

Several studies have been carried out particularly on polygenic traits that have different alternate forms for example , white flower color vs purple flower color . However many traits are more multifaceted than this and can take on any number of incessant values . For instance in humans there are not just two groups of people i .e . tall vs . short- but a full range

of possible heights . To add on , many traits are not controlled by a single pair of gene but by numerous genes that interact with each other and also with the environment . The study done on traits controlled by multiple genes and also by the environment is referred to as quantitative genetics . This is regarded as one of the complex area of genetics but a little understanding of quantitative genetics is necessary for evolution since evolution usually acts on complex traits which are influenced both by genetics and by the surroundings /environment

Polygenic and appearance of blending inheritance

One of the main challenges in genetics during the early years of the 20th century concerned the following question : If Mendel 's thoughts were right then how can one clarify the inheritance of quantitative traits Statistical research reveals that for quantitative traits the offspring of a cross breed tend to be intermediate in looks between the two parents . For example if one parent is short and the...