Morgan hybridised yellow - bodied, white - eyed females to brown - bodued, red - eyed males and intercrossed their `F_(1)` progeny. He observed that
(a) `F_(2)` ratio was deviated very significantly from the 9 : 3 : 3 : 1 ratio
(b) Both genes did not segregate independently of each other
(c) Recombinant types are not obtained in `F_(2)` generation
(d) Both genes segergate in independently of each other .
Select the correct set of statements :

Options

A. a & b only
B. b & c only
C. b & d only
D. c &d only

Answer

To solve the question regarding Morgan's experiments with Drosophila, we need to analyze the statements provided based on the principles of inheritance and the results of his crosses.

### Step-by-Step Solution:

1. **Understanding the Cross**: Morgan hybridized yellow-bodied, white-eyed females with brown-bodied, red-eyed males. This means he was studying two traits: body color and eye color in Drosophila.

2. **Identifying the F1 Generation**: The F1 progeny from this cross would exhibit dominant traits. In Drosophila, the brown body and red eye traits are dominant over yellow body and white eye traits. Therefore, all F1 progeny would be brown-bodied and red-eyed.

3. **Intercrossing F1 Progeny**: When Morgan intercrossed the F1 progeny, he expected to see a typical Mendelian dihybrid ratio of 9:3:3:1 in the F2 generation if the genes were assorting independently.

4. **Observation of F2 Ratio**: Morgan observed that the F2 ratio deviated significantly from the expected 9:3:3:1 ratio. This indicates that the two traits were not assorting independently.

5. **Linkage of Genes**: The deviation in the ratio suggests that the genes for body color and eye color are linked, meaning they are located on the same chromosome. This linkage reduces the likelihood of recombination between the two traits.

6. **Recombinant Types**: While Morgan did not observe a complete absence of recombinant types, he noted that the parental types were more frequent than the recombinant types. This suggests that there was some recombination, but it was not as frequent as expected under independent assortment.

7. **Conclusion on Statements**:
- **Statement (a)**: Correct, as the F2 ratio deviated from the expected 9:3:3:1.
- **Statement (b)**: Correct, as the genes did not segregate independently due to linkage.
- **Statement (c)**: Incorrect, as recombinant types were present but less frequent.
- **Statement (d)**: Incorrect, as the genes did not segregate independently.

### Correct Set of Statements:
The correct statements are (a) and (b).