Match List-I with List-II:
| List-I | List-II |
|---|---|
| Scientists | Discovery |
| (A) Sutton and Boveri | (I) X-Body |
| (B) Sturtevant | (II) Chromosomal Theory of Inheritance |
| (C) Henking | (III) Transformation in bacteria |
| (D) Griffith | (IV) Genetic maps |
Choose the correct answer from the options given below:
Answer & explanation
Correct answer: option 1
The correct answer is Option (1) → (A)-(II), (B) -(IV), (C)-(I), (D)-(III)
(A) Sutton and Boveri — this matches (II) Chromosomal Theory of Inheritance. In 1902 they showed that chromosomes pair and separate at meiosis just as Mendel’s factors do. They united chromosomal segregation with Mendel’s principles.
(B) Sturtevant — this matches (IV) Genetic maps. He used the frequency of recombination between gene pairs on the same chromosome as a measure of the distance between them, and so mapped the positions of genes.
(C) Henking — this matches (I) X-Body. In 1891, studying sperm formation in insects, he saw a nuclear structure that only half of the sperms received. He named it the X body; it was later known as the X chromosome.
(D) Griffith — this matches (III) Transformation in bacteria. In 1928 he showed that heat-killed S strain Streptococcus pneumoniae could change live R strain bacteria into the virulent S form. Something passed from the dead bacteria to the living ones.