In a macerated baby, ideal sample for genetic analysis is obtained from:
**Core Concept**
The ideal sample for genetic analysis in a macerated baby is crucial due to the limited availability of viable tissues. Maceration refers to the softening and breakdown of tissues due to autolysis after fetal death. In such cases, the integrity of the DNA is critical for genetic analysis.
**Why the Correct Answer is Right**
The correct answer is bone marrow due to its relatively high cellular content and lower risk of contamination. Bone marrow is an ideal source for DNA extraction as it contains a high concentration of cells, including hematopoietic stem cells. This is particularly useful in macerated babies where other tissues like skin, muscle, or organs may be compromised. The bone marrow's cellular composition also reduces the likelihood of DNA degradation, ensuring a more reliable genetic analysis.
**Why Each Wrong Option is Incorrect**
**Option A:** Blood is not the ideal sample for genetic analysis in a macerated baby as it may be contaminated with bacteria, leading to DNA degradation and false results.
**Option B:** Muscle tissue is not suitable due to its high risk of contamination and potential for DNA degradation, making it less reliable for genetic analysis.
**Option C:** Skin scraping is not an ideal option as it may contain bacteria and other contaminants, compromising the integrity of the DNA.
**Clinical Pearl / High-Yield Fact**
When dealing with macerated babies, it is essential to prioritize the collection of bone marrow samples for genetic analysis, as it offers the highest chance of obtaining reliable and accurate results.
**Correct Answer: C. Bone marrow. Bone marrow.**