In the first cross one of the parent has only dominant allele and one has only recessive allele that means the offspring in F1 will be 100% heterozygous
XxYyZz 
the gametes resulted from this individual are
XYZ XYz XyZ Xyz xYZ xYz xyZ xyz
it produces 8 types of gamets one of which is xyz the proportion is 1/8
 
        
             
        
        
        
<span>The trait that is ancestral to all chordates is the presence of a notochord...the others are gill slits and nerve chord</span>
        
                    
             
        
        
        
The biome that exist closest to the Earth's poles are descibed as polar
        
             
        
        
        
A bacteria cell differs from a plant or animal cell by being less complex in structure.