1. | new mutations were frequently generated in the F2 progeny, "reinventing" traits that had been lost in the F1. |
2. | the mechanism controlling the appearance of traits was different between the F1 and the F2 plants. |
3. | traits can be dominant or recessive, and the recessive traits were obscured by the dominant ones in the F1. |
4. | the traits were lost in the F1 due to dominance of the parental traits. |
Assertion (A): | Organisms lacking one complete chromosome are called monosomics. |
Reason (R): | Down’s syndrome is an example of monosomy. |
1. | Both (A) and (R) are true and (R) is the correct explanation of (A). |
2. | Both (A) and (R) are true but (R) is not the correct explanation of (A). |
3. | (A) is true but (R) is false. |
4. | Both (A) and (R) are false. |
List I | List II |
A. Mendelian Disorder | I. Chromosomal Theory of inheritance |
B. Alfred Sturtevant | II. Klinefelter's syndrome |
C. Chromosomal Disorder | III. Cystic fibrosis |
D. Sutton and Boveri | IV. Used the frequency of recombination between the gene pair in the same chromosome |