Exam 3 - Lecture 9 - DNA & Its Role In Heredity

Question 1

What are the 4 properties of DNA early scientists wanted to demonstrate?

Answer 1

(1) DNA localized to the nucleus and condensed in chromosomes
(2) DNA doubles in content during S phase
(3) Diploid cells have twice the DNA as haploid cells
(4) DNA demonstrates patterns of transmission identical to carried genetic information

Question 2

What is Chargaff’s Rule?

Answer 2

Total purine content = total pyramidine content

⇒ so total adenine = total thymine

⇒ and total guanine = total cytosine