What are the genotypic and phenotypic ratios

- Genotype is the genetic make-up of an organism that describes the nature of each trait. (the letters we often write for a certain trait)

- Phenotype is the morphology of a living organism .(the trait you usually observe while looking/tracking the organism)

Example:

- In the flower of a pea plant there are a pink color(RR) or (Rr) and a white color(rr).

- When crossing two hybrid ( with two different letters) pink colors,

P  :     Rr        ×      Rr  

G :      R    r        R    r    

F1 :  RR   Rr    Rr    rr

- the phenotype ratio will be  (3 pink : 1 white)

- the genotype ratio will be  [1 (RR) : 2 (Rr) : 1 (rr)]..