Suppose you count tobacco seelings in six agar plates, and your data are as follows:125 green plants and 39 white plants. What is the phenotypic ratio?
What is phenotipic? It is is the composite of an organism's observablecharacteristics or traits, such as its morphology, development, biochemical or physiological properties, phenology, behavior, and products of behavior (such as a bird's nest). Phenotypes result from the expression of an organism's genes as well as the influence of environmental factors and the interactions between the two.
Ratio of tobacco morphology is 125:39 (green:white). it is about 3:1. This ratio is one of the Mendel's laws - Law of Segregation. The resault of crossing heterozygous animals is offspring, part of which has dominant traits, and some - recessive, called segregation. Segregation - the distribution of dominant and recessive traits of offspring in a numerical ratio. Such a distribution of the phenotype is the phenotypic ratio.