Answer:
The correct option is Number 1. AaBb x AaBb
Explanation:
Genes can be described as basic hereditary units. The genes are made up of DNA. 
A gene carries two alleles for a particular trait. These alleles are present at the same loci in the homologous chromosomes. If the two alleles are similar then they are termed as homozygous e.g AA, BB. If the alleles for a trait are different then they are termed as heterozygous e.g Aa and Bb.
 
        
             
        
        
        
Answer:
Correct answer in blank 1. Insulin.Correct answer in blank 2. Glucagon.Explanation:Insulin is hormone released by pancreas which lowers the sugar level in blood by changing sugar to other forms.Glucagon is a hormone released by pancreas which increase the sugar level in blood.As Lisa eats banana blood sugar increase signaling increase of insulin.After few hours blood sugar decrease due to insulin, signals glucagon production to increase glucose level.
 
        
             
        
        
        
Instructions for an inherited traits are called genes.
        
                    
             
        
        
        
Answer:
In higher vertebrates the internal fluid of the inner ear (not external fluid as in fish) bathes ... The pinna and external auditory meatus collect these waves, change them ... 12.3 The Cochlea: three scalae, basilar membrane, movement of hair cells ... frequency sounds stimulate the base of the cochlea, whereas low frequency ...
Explanation:
 
        
             
        
        
        
For the second one its dominant and recessive