**Core Concept**
Streak gonads are a characteristic feature of certain genetic disorders, where the gonads fail to develop properly due to a lack of sex chromosomes. This condition is often associated with other developmental abnormalities. In the context of embryology, streak gonads are a hallmark of sex reversal.

**Why the Correct Answer is Right**
Streak gonads are typically seen in individuals with Turner syndrome, a genetic disorder characterized by the complete or partial absence of one X chromosome. The absence of sex chromosomes leads to the failure of gonadal development, resulting in streak gonads. This condition is often accompanied by other physical and reproductive abnormalities. The gonads in Turner syndrome are unable to produce sex hormones and gametes, leading to infertility and other complications.

**Why Each Wrong Option is Incorrect**
**Option A:** This option is incorrect because streak gonads are not typically associated with Klinefelter syndrome, a genetic disorder characterized by an extra X chromosome in males. While individuals with Klinefelter syndrome may experience reproductive issues, they do not typically have streak gonads.

**Option B:** This option is incorrect because streak gonads are not typically associated with Swyer syndrome, a genetic disorder characterized by a 46,XY karyotype with testicular dysgenesis. While individuals with Swyer syndrome may experience reproductive issues, they do not typically have streak gonads.

**Option C:** This option is incorrect because streak gonads are not typically associated with intersex conditions, which are characterized by a combination of male and female physical characteristics. While individuals with intersex conditions may experience reproductive issues, they do not typically have streak gonads.

**Clinical Pearl / High-Yield Fact**
Streak gonads are a key diagnostic feature of Turner syndrome, a genetic disorder that affects approximately 1 in 2,500 live-born females. Recognizing this characteristic can help clinicians diagnose and manage this condition.

**Correct Answer:** D.