In humans, the gene for Huntington's disease contains a triplet sequence repeat, which is expanded in the disease allele, relative to the normal allele. This type of change in DNA is called a .

Heat from earths interior and pressure from overlying rock transform the remains of marine sediments into

Imagine you are introducing the lac operan and the trp operon to students who have never learned about it before. complete the table to compare the similarities and differences between the two operons

Diabetes is often suspected when glucose shows up in urine tests. use the model to explain how glucose could be present in urine. why do you think this symptom is especially concerning for young people?