Compléter GeneticsVersion en ligne Students will click the correct word(s) to complete the sentence. par Shylane Laing Jordan 1 DNA determines . Traits - are characteristics that you got from your Heredity - is the of from parents to . Genetics - is the of . Gregor Mendel is The Of . Genes are pieces of have between 20 , 000 to 30 , 000 genes You have copies for every gene The copies of are called . There are two possible alleles : Dominant and Dominant allele is an allele ( gene copy ) whose trait always . Recessive allele is an allele ( gene copy ) whose trait can be masked or by the dominant allele . A Dominant allele a allele As a result a Dominant Trait will always . A Punnett is a that shows all the possible of alleles that can result from a cross . You can use a Punnett Square to the that with a certain of alleles .