Chromosome number of paial hydatidiform mole most commonly is:-
**Core Concept**
A partial hydatidiform mole is a rare type of gestational trophoblastic disease characterized by an abnormal placenta, resulting from the fertilization of an empty egg by two sperm, leading to a haploid set of maternal chromosomes and a diploid set of paternal chromosomes. This anomaly affects the normal development of the fetus.
**Why the Correct Answer is Right**
The correct answer is based on the genetic makeup of a partial hydatidiform mole. Since it is caused by the fertilization of an empty egg by two sperm, the resulting embryo will have a haploid set of maternal chromosomes (23, X) and a diploid set of paternal chromosomes (46, XX). This anomaly results in a total of 69 chromosomes, making the chromosome number of a partial hydatidiform mole most commonly 46, XX, but due to the extra paternal genetic material, the correct answer is 69,XX, or more accurately **69,XXY**.
**Why Each Wrong Option is Incorrect**
* **Option A:** This option is not provided, so we cannot evaluate it.
* **Option B:** This option is not provided, so we cannot evaluate it.
* **Option C:** This option is not provided, so we cannot evaluate it.
**Clinical Pearl / High-Yield Fact**
Partial hydatidiform moles are usually identified by ultrasound and are associated with an increased risk of gestational trophoblastic neoplasia (GTN). Patients with a partial mole should be closely monitored for signs of GTN, including persistent vaginal bleeding, hyperthyroidism, and elevated human chorionic gonadotropin (hCG) levels.
**Correct Answer:** **D**. 69,XXY