In the dihybrid cross performed by Morgan the recombination types `37.2%` are found during study of

Options

A. yellow body and white eye in Drosophila
B. blue flower and long pollen in sweet pea
C. white eye and miniature wing in Drosophila
D. Seed colour and seed shape in maize

Answer

To solve the question regarding the dihybrid cross performed by Morgan and the recombination types found, we can follow these steps:

### Step-by-Step Solution:

1. **Understanding the Dihybrid Cross**:
- A dihybrid cross involves two traits. In this case, we are looking at traits in Drosophila (fruit flies) - specifically, eye color (white vs. red) and wing type (miniature vs. normal).

2. **Identifying the Parental Generation**:
- Morgan crossed a white-eyed, miniature-winged female (genotype: WW MM) with a wild-type male (genotype: W+ W+ M+ M+).
- Here, WW represents the white eye trait, MM represents the miniature wing trait, and W+ and M+ represent the dominant traits (red eye and normal wing).

3. **F1 Generation**:
- The F1 generation from this cross will all be heterozygous for both traits (genotype: W+ W MM+ M).
- All offspring will exhibit the dominant traits (red eyes and normal wings).

4. **Test Cross**:
- The F1 females (red-eyed, normal-winged) are then test-crossed with a white-eyed, miniature-winged male (WW MM).
- This test cross will help determine the phenotypic ratios of the offspring.

5. **Analyzing the Offspring**:
- In the test cross, the offspring will show two types of parental phenotypes (red-eyed normal-winged and white-eyed miniature-winged) and two types of recombinant phenotypes (red-eyed miniature-winged and white-eyed normal-winged).
- According to Morgan's findings, 62.8% of the progeny were of parental types, while 37.2% were recombinants.

6. **Conclusion**:
- The recombination types of 37.2% were specifically found during the study of white-eyed and miniature-winged Drosophila.

### Final Answer:
In the dihybrid cross performed by Morgan, the recombination types of 37.2% are found during the study of white eye and miniature wing in Drosophila.

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