Breaking down the question
The question asks specifically about the heterogenic features that influenced Indian tradition, according to Yogendra Singh. Two elements must be handled with care. First, the answer must be anchored in Singh's framework as set out in his Modernization of Indian Tradition (1973), not in a general discussion of Indian culture. Second, the word heterogenic is a technical term in his scheme: it refers to sources of change that originate outside the traditional cultural system, as opposed to orthogenetic change that unfolds from within it.
The examiner therefore wants the candidate to reconstruct Singh's model of Indian tradition and then identify the external — heterogenetic — forces that acted upon it. A strong answer first defines tradition as Singh conceived it, states his distinction between orthogenetic and heterogenetic change, and then details the major heterogenic influences, chiefly the Islamic and the Western–colonial contacts, showing how each worked at both the cultural and the structural level.
How to approach it
Begin by outlining Singh's understanding of Indian tradition through its core organising principles, and introduce his central analytical distinction between orthogenetic and heterogenetic sources of change. Then devote the body of the answer to the heterogenic features themselves — the encounter with Islam and, more transformatively, the encounter with the West under colonialism — analysing how they impinged on the value structure and the social structure of Indian society. Conclude by assessing how these external forces set in motion the modernisation of Indian tradition.
The register should be conceptual and faithful to Singh's vocabulary. Distinguish carefully between change at the level of cultural values and change at the level of social structure, since Singh insists on both. Relate his heterogenetic sources to the more familiar processes of Sanskritisation and Westernisation identified by M. N. Srinivas, and note Singh's debt to Robert Redfield's distinction between orthogenetic and heterogenetic transformation, which he adapted to the Indian material.
Model answer
Yogendra Singh, in his Modernization of Indian Tradition, sought a theoretically integrated account of how Indian society changed under the pressure of successive historical encounters. He began by characterising the traditional value system of Indian society through a set of organising principles — the hierarchical ordering of groups, a holism that subordinated the individual to the collectivity, an emphasis on continuity across time, and a transcendental orientation that placed ultimate value in the religious and otherworldly. These principles gave Indian tradition, as embodied above all in the caste order and its supporting ritual and philosophical apparatus, its distinctive coherence and durability.
To analyse how such a tradition changes, Singh drew on Robert Redfield's distinction between two kinds of transformation. Orthogenetic change arises from within the cultural system itself, elaborating and reinterpreting its own inherited premises without breaking with them; the reform and revitalisation movements internal to Hinduism exemplify this endogenous mode. Heterogenetic change, by contrast, originates outside the system, in contact with a culture whose premises differ from and often contradict those of the receiving tradition. The heterogenic features the question refers to are precisely these external sources of change — influences that entered Indian tradition from outside and challenged its constitutive principles.
The first major heterogenetic influence in Singh's account was the contact with Islam. The establishment of Islamic political power and the long cohabitation of Islamic and Hindu traditions introduced an alternative civilisational value system — egalitarian in doctrine, monotheistic, and organised on principles different from caste hierarchy and Hindu holism. Singh analysed this contact as producing changes at both the cultural and the structural levels: syncretic movements, new religious and devotional currents, and adjustments in social organisation, even as the core structure of caste society proved resilient and largely absorbed or contained the challenge. The Islamic encounter thus represented a genuinely heterogenetic source, though its transformative reach into the deep structure of tradition remained limited.
The second and far more consequential heterogenetic influence was the contact with the West through British colonialism. This encounter brought a value system built on wholly different premises — individualism against holism, egalitarianism against hierarchy, rationalism and secularism against the transcendental and sacred orientation, and historicism against the emphasis on continuity. Singh argued that Western influence penetrated Indian tradition far more deeply than any earlier contact because it operated simultaneously through cultural and structural channels. Culturally it introduced new ideas of reason, equality, individual rights and secular knowledge through Western education, law and administration. Structurally it reorganised the economy, the polity and the legal order, creating modern occupations, bureaucratic administration, a market economy, new communications and modern political institutions that undercut the material foundations of the traditional order.
Singh was careful to distinguish these two levels. Change at the cultural level altered the value orientations and normative ideas of Indian society; change at the structural level transformed the concrete institutions and role relationships through which those values were enacted. The heterogenetic Western contact was so powerful precisely because it advanced on both fronts at once, so that new values and new structures reinforced one another. The result was not a wholesale replacement of tradition but a complex, uneven interaction in which modern and traditional principles coexisted, competed and combined.
Singh related these heterogenetic processes to the more familiar mechanisms of change identified by M. N. Srinivas. Sanskritisation, in which lower groups emulate the practices of higher castes, is largely an orthogenetic process working within the logic of the caste system, whereas Westernisation, the adoption of Western values, institutions and lifestyles, is heterogenetic, flowing from the external Western contact. By locating both within a single framework, Singh integrated the study of Indian social change into a coherent theory.
The significance of the heterogenic features, in Singh's analysis, is that they set in motion the modernisation of Indian tradition. External contacts, above all the Western one, introduced the value premises and institutional structures of modernity into a society organised on contrary principles, generating the tensions, adaptations and hybrid forms that characterise modern India. Tradition was neither simply preserved nor simply destroyed; it was continuously reworked through its interaction with these heterogenetic influences, producing the distinctive and unfinished modernity that Singh set out to explain.
Examiner's perspective
The examiner is testing whether the candidate can reproduce Singh's specific framework rather than offer a loose essay on Indian culture. The best answers define tradition through his organising principles, state the orthogenetic–heterogenetic distinction precisely, and then treat the Islamic and Western contacts as the principal heterogenic features, analysing each at both the cultural and the structural levels.
Weaker responses confuse the technical term heterogenetic, drift into unrelated discussion, or fail to connect Singh's scheme to Sanskritisation and Westernisation and to Redfield's original distinction. A candidate who keeps to Singh's vocabulary, maintains the two-level analysis of cultural and structural change, and closes by linking the heterogenetic contacts to the modernisation of Indian tradition demonstrates exactly the disciplined command the question rewards.