Scientists have recently modified the bacteria that cause tooth decay by inserting a fragment of DNA into the bacteria's DNA that prevents it from producing lactic acid. What is the new DNA called?

Draw a punnett square to show a cross between a chocolate lab that is homozygous dominant for the epistatic gene and a black lab that is heterozygous for the epistatic gene and homozygous for the color gene. describe the genotype and phenotype of the possible offspring.