The structure in females which is homologous to testis is the?

Appeared in: DSSSB - 29 August 2019 (Shift-1)

Explanation

The ovary is the female gonad, which is the primary reproductive organ in females.
It is considered homologous to the male testis because both structures originate from the same embryonic tissue, known as the gonadal ridge.
Functionally, both are gonads responsible for producing gametes (eggs and sperm) and sex hormones (estrogen/progesterone and testosterone).

Option B: The uterus develops from the fusion of the Müllerian (paramesonephric) ducts, not the gonadal ridge. Therefore, it is not homologous to the testes.
Option C: The cervix is the lower part of the uterus and, like the uterus, develops from the Müllerian ducts. It is not homologous to the testes.
Option D: The fallopian tubes also develop from the Müllerian ducts. Their function is to transport the egg from the ovary to the uterus. They are not homologous to the testes.

Clinical Relevance

Nursing practice connection: This is primarily an exam-oriented knowledge point with limited direct bedside application, so retain Homologous structures of the male and female reproductive systems as background academic context rather than a clinical decision trigger.
Understanding homologous structures is fundamental to comprehending disorders of sexual development (DSD), where there can be ambiguity in the development of internal and external genitalia.
For example, in Androgen Insensitivity Syndrome (AIS), a person with a 46,XY karyotype has testes, but their body cannot respond to testosterone. This results in the development of female external characteristics, but they lack a uterus and ovaries, demonstrating the critical role of hormonal signals in differentiating these homologous structures.
Knowledge of embryology helps nurses provide sensitive and informed care to patients with congenital reproductive anomalies.

How to Approach the Question

First, identify the key term in the question: 'homologous'. This term refers to structures that have a common evolutionary and developmental origin.
The question asks for the female structure homologous to the male 'testis'. This requires recalling knowledge of reproductive system embryology.
Consider the primary function of the testis: it is the male gonad, producing sperm and hormones.
Evaluate the options to find the female gonad. The ovary is the female gonad, responsible for producing eggs and hormones.
Confirm the embryological origin. Both the testes and ovaries develop from the indifferent gonad (gonadal ridge), confirming they are homologous.
Rule out the other options by recalling their embryological origins (Müllerian ducts), which differ from that of the testes.

Concept Tested & Keywords

Concept Tested: Homologous structures of the male and female reproductive systems.
Stem keywords: females, homologous, testis
Lead-in keywords: is the

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E6 Pharmacology Nursing Lilley 11e Part 2 p. 230-232

E6 Gynecology Williams p. 390-397

Practise the full DSSSB - 29 August 2019 (Shift-1)

Attempt every question from this paper in a timed mock, then review the full solution for each one.