Answer:
Mutation 
Explanation:
In genetics, any heritable change of the base-pair sequence of genetic material is referred to as MUTATION.
SIV (Simian Immunodeficiency Virus) must have undergone mutation, which is the basis of genetic variation or evolution 
 
        
                    
             
        
        
        
Answer:
A parent with one copy of a dominant allele and one recessive coded Ww for the widow's peak  is called heterozygous for a trait and has a 50 percent chance of passing on the dominant allele to each of his or her offspring, regardless of the gene inherited from the other parent.
Explanation:
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Answer:
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hi here is your answer hope it helps or then sry 
Explanation:
the importance of oxygen for animals, researchers suspected that a sudden increase in the gas to near-modern levels in the ocean could have spurred the Cambrian explosion.