Which factors changed throughout the experiment? Check all that apply. the trait examined, fur color the organism, mice which allele was dominant and which allele was recessive the genes of the parental mice other aspects of the mice fur color of the offspring deletion

4 - the genes of the parental mice

6 - fur color of the offspring

Explanation:

previous question

allowed for the prediction of the properties of missing elements.

during the process of dna replication, brdu can replace thymidine and incorporate into the newly synthesized dna, cell proliferation thus can be reflected in the extent of brdu incorporation.