Answer:
A punnet square can be described as a diagram which is made to check the outcomes of a cross. 
To check the probability of the offsprings of a cross between homozygous dominant thumb shape parent with a homozygous recessive thumb shape parent, let's draw a punnet square:  
         t              t
T    Tt            Tt
T    Tt            Tt
The results of the punnet square depict that:
Genotype: All of the offsprings will be heterozygous for the thumb shape trait. Tt will be the genotype.
Phenotype: All of the offsprings will show the thumb shape like the thumb shape of the dominant parent. 
 
        
             
        
        
        
Answer:
sure, I'm bored too. So what do what to talk about?
 
        
                    
             
        
        
        
a chemical landfill is where chemical waste is stored once it has been used 
if it is secure it means that the waste cannot pollute the environment through water, air etc