Question

Arrange these discoveries in chronological order from oldest to latest.
i. Isolation of a compound called nuclein.
ii. “Heredity factors”
iii. Genes are located on chromosomes
iv. DNA is genetic material

• A. i, ii,iii,iv
• B. ii,i,iv,iii
• C. ii,i,iii,iv
• D. iv,iii,i,ii

Answer 1

The correct option is C ii,i,iii,iv

In 1850, Gregor Johann Mendel, known as the "father of genetics", stated that certain heredity factors were responsible for transmission of traits from parents to offsprings . Friedrich Miescher in 1869, isolated a compound called nuclein which was later termed as nucleic acid. Thomas Hunt Morgan, in 1915, discovered that genes are located on chromosomes. Later in 1944, Maclyn McCarty proved that DNA is the genetic material. This discovery paved the way for advancement in modern biotechnology.