ROLE OF HEREDITY AND ENVIRONMENT 2026: What role do heredity and environment play in a child’s development? Here is complete information on this topic.
ROLE OF HEREDITY AND ENVIRONMENT 2026: When observing the intellect, temperament, tastes, conduct, beliefs, moral values, and physical characteristics of people across the world, one notices immense and often unpredictable variation. Some are handsome while others are plain; some are tall while others are short; some are intelligent while others are dull; some are stern and rigid while others are generous and open-minded. Furthermore, an individual may resemble everyone else in certain aspects, resemble only a few in others, and be unlike anyone else in yet other respects. Observing all this, it becomes evident that no two people are identical in terms of mental or physical capabilities; there is always some degree of difference. These differences become more pronounced as one ages. Variations are observed even among those raised in the same environment or born into the same family. This diversity has proven to be a boon for humans, enabling them to distinguish one individual from another. Such disparity among living beings is a fundamental characteristic of nature.
From the points mentioned above, it is evident that individuals differ from one another in terms of both mental and physical capabilities. Another significant observation is that children resemble their parents and ancestors in certain physical and mental traits; however, some individuals exhibit unique characteristics not found in either parent. The answer to the question of why this occurs lies in heredity and environment, and the branch of science that explains these factors is known as genetics.
ROLE OF HEREDITY AND ENVIRONMENT 2026: Heredity
How do organisms originate? What are the reasons for the physical and mental differences between organisms? How do such variations manifest? How do the traits of parents and ancestors appear in their children? What causes traits not present in the parents to appear in the children? Genetics is the science that studies such questions in a logical and scientific manner.
Meaning of Heredity: Heredity is also referred to as ‘lineage’ or ‘ancestry’. These terms are simply used for heredity…
Synonyms and Definitions: Heredity refers to that which is acquired or received through lineage.
- ‘Heredity is a divine stream that flows continuously and eternally through the passage of time.’
- ‘Heredity is the process by which the physical and mental traits of parents are passed down to their children.’
- According to ‘Mann’: ‘Heredity is that which is transmitted from parents to their offspring through genes.’
- According to ‘Ruth Benedict’: ‘Heredity is the specific quality of transmitting traits from one generation to the next.’
Heredity is categorized into two types: biological and psychological. Biologically, it deals with the transmission of an organism’s biological elements; psychologically, it explains how latent traits and mental capacities are passed from generation to generation—from parents to the child.
Principles of Heredity: Expecting all children in a family to be identical is as simplistic a notion as believing that no traits are passed from parents to the child at all. To study these traits, heredity operates based on three principles regarding capacities.
• The principle that “like begets like”: This is the first principle. According to this, children resemble their parents in various ways. It encompasses several aspects, such as talented parents having talented children and average parents having average children.
• The principle of variation in offspring: This is the second principle. It states that children are not exact replicas of their parents; they exhibit both similarities and differences. In other words, children within the same family differ in terms of intellect, physique, and capabilities. Key examples include parents of average or lower ability having exceptional children, or highly capable parents having children of lower ability.
• The principle of regression towards the mean: This is the third principle. A prime example is the tendency for the children of exceptional parents to move towards an average or mean level.
• Mechanism of Heredity: The mechanism of heredity explains how hereditary traits are transmitted from parents to their children. This process can be described through the following stages:
The female ovary produces the ovum (egg cell), and the male testis produces the sperm cell. These are extremely minute and invisible to the naked eye. When a sperm fuses with an ovum, a new cell is formed; this is known as a ‘zygote’ or the moment of conception. Thus, the very instant the sperm unites with the ovum marks the origin of the future individual, and the physical and mental traits that will manifest in that person are determined at that moment. Characteristics such as height, complexion, body structure, hair color, intelligence, and eye color are all determined then and subsequently manifest as the individual grows and develops. Heredity is constituted by all the following factors.
- Ovum
- Sperm
- Chromosome
- Sex Chromosomes
- Genes
- Zygote
- Chromosome division
- Twins
ROLE OF HEREDITY AND ENVIRONMENT 2026: Environment
This concept evolves continuously over the course of time. There is no place devoid of an environment, and no living being remains unaffected by it. Generally, the mere mention of “environment” brings a multitude of thoughts to mind. We think of the air we breathe, the food we eat, our clothing, the homes we inhabit, the objects we use, schools, classmates, fellow living beings, water, vegetation, and countless other elements of the biological and physical world. While these represent the external world of an organism, the scope of the environment actually encompasses every factor that influences an organism—starting from the very moment of its origin at the cellular level through to its subsequent growth and development. The components of the environment are innumerable, and the environment itself is dynamic. Various definitions have been proposed to explain the concept of the environment, as outlined below:
Meaning of Environment
- All factors that influence an organism—excluding heredity—are considered part of the environment.’
- An individual’s environment is the sum total of all stimuli that act upon that individual.’ • According to Woodworth: “Environment refers to all the external factors that influence an individual from birth until death.”
- According to Boring: “Environment encompasses everything that influences an individual’s external behavior, excluding their genes.”
When considering this broad definition, environment comprises all factors that influence an organism’s growth and development from its inception—specifically, from the formation of the zygote (conception)—until the end of its life. Such an environment can be broadly classified into two categories.
- Prenatal Environment
- Postnatal Environment
1. Prenatal Environment
The prenatal environment—also known as the intrauterine environment—contains various essential biochemical substances and chemical fluids required for the development of the fetus. This environment spans the period from conception until the birth of the child.
Any variations or abnormalities in the fluids surrounding or within the developing cells in the mother’s womb can have a lasting impact on the child. The child may become susceptible to various physical and mental disorders. Medications and nutrients consumed by the mother influence the developing fetus. Similarly, the mother’s mental state also has a definite effect on the child. Thus, this intrauterine environment plays a pivotal role at every stage of the child’s development; even the slightest anomaly within it can cause significant adverse effects on the child’s physical and mental constitution.
2. Postnatal Environment
The postnatal environment—often referred to as the physical environment—is vast in scope. Beginning the moment the child emerges from the mother’s womb, this environment continues throughout life until the individual is laid to rest in the earth. It is vast and complex, encompassing countless physical, social, and cultural elements. Culture, civilization, ideologies, daily necessities, the organizations we establish, the air, water, and food we consume, our social interactions, norms, beliefs, and traditions—all these not only influence an individual’s behavior but also shape it. Thus, from the moment of birth until the very end, an individual exists within the sphere of the environment at every moment, moving forward under its influence.
The Role of Heredity and Environment in the Growth and Development of an Organism
Heredity and environment are key factors in shaping an individual’s development and their physical and mental characteristics. Naturally, the question arises as to which of the two is more influential. Many studies have been conducted to examine the effects of heredity and environment separately; let us look at some of the significant ones here.
- The argument for the primacy of heredity: Citing the Kannada proverb “Like mother, like daughter” (or “As the thread, so the sari”), many argue that innate traits inherited through heredity are the primary drivers of an individual’s physical, mental, and social development. According to this view, heredity determines a child’s entire future. They cite several studies to support this argument
- The research of Galton and Pearson indicates that among the distinguished families studied—including that of the famous American naturalist Charles Darwin—many members were renowned scientists.
- All 1,200 descendants of the “Juke” lineage in New York were found to be of a degenerate nature, much like their progenitor, Max Juke.
- The Kallikak Study: In the Kallikak family, the seven children of a mentally weak, promiscuous mother and a disabled father all turned out to be criminals and promiscuous individuals.
These findings suggest that mental abilities are hereditary. However, it is difficult to conclude that the environment plays no role at all. One could have definitively attributed primacy to heredity only if individuals from the “good” Kallikak lineage had remained virtuous even in a depraved environment, and those from the “inferior” lineage had remained depraved even in a favorable environment. Consequently, the aforementioned studies do not prove the absence of environmental influence.
- Arguments of Environmentalists: Although the studies mentioned above suggest the dominance of heredity, environmentalist psychologists—such as Watson, Woodworth, and Lamarck—have conducted their own research to demonstrate the significant impact of the environment. Some of their studies are outlined below.
- Watson’s Emphasis on Environment: Watson placed immense importance on the environment. In his own words, he stated: “Give me a dozen healthy, well-formed infants and a world of my own to bring them up in, and I guarantee to take any one of them at random and train him to become any type of specialist—a doctor, lawyer, engineer—or even a beggar or a thief, regardless of his ancestry.” • A study by Goddard indicates that the average Intelligence Quotient (IQ) of children from the ‘Dohi’ group is 69.06, while that of people from the ‘Jippi’ group is 73.5. He attributes this difference to the disparity in environmental richness.
- The case of Amala and Kamala—sisters from India—illustrates this point; they were carried off by wolves in infancy and raised among them. When discovered years later, both exhibited behaviors characteristic of wolves. This demonstrates the powerful influence of the environment.
- The statement by the great poet Kuvempu—”A noble soul can become a wicked one due to circumstances, and a wicked soul can become a noble one”—underscores the significance of the environment.
- The adage “A criminal is made, not born” further highlights the importance of environmental factors.
- Two Contrasting Views: An examination of these arguments reveals a divide. One group contends that innate traits derived from heredity drive an individual’s mental, physical, and social development. Conversely, another group argues that regardless of hereditary traits, it is the environment in which a person lives that determines their education, development, personality, and way of life. If one were to accept the argument that heredity is the primary factor, then all children attending the same school should achieve identical educational outcomes; however, reality shows this is not the case. Extensive research has been conducted on both these aspects. A key study among them is the research conducted by Barburbark on twins. Based on her findings, she stated that “just as heredity plays a role in education, environment also has an influence; however, heredity exerts three times as much influence as the environment.”
Despite extensive research into the respective influences of heredity and environment on an individual’s life, one fundamental fact remains unchanged: it is clear that the environment exerts an influence just as heredity does. Neither can exert its influence in isolation from the other. Just as both oil and a wick are essential for a lamp to produce light, heredity cannot manifest its impact without the influence of the environment. If the inherited endowment finds a suitable environment, it flourishes productively, leading to the development of skills; otherwise, much of that potential goes to waste. Conversely, no matter how excellent the environment, an individual’s skills cannot develop without a strong hereditary foundation. An individual is a product of their circumstances and a creation of their environment; thus, the two are mutually interdependent.
• Two types of endowment: In addition to the hereditary strengths and capabilities personally inherited from ancestors, an individual also receives certain advantages from the social environment. The question of which—heredity or environment—is more important is not the central issue; rather, the two arguments are complementary and mutually reinforcing. Dr. As the saying goes, “Man is an independent being; he is neither a slave to his environment nor a victim of heredity. He can control his environment and transform his heritage.” This represents the modern perspective. It is appropriate to view heredity as the seed and the environment as the soil that nurtures it; to achieve the best outcome, one requires both a high-quality seed and equally fertile soil. A deficiency in either inevitably leads to a compromised result. Both forces complement each other in an individual’s development. Heredity acts as a pre-existing imprint, while heritage consists of the residual experiences shaped by life’s circumstances; thus, heredity itself can be seen as the product of environmental conditions from a past era. Growth determined by heredity essentially requires a supportive environment to unfold.
Educational Significance of Heredity and Environment
A child’s hereditary endowment is akin to a seed, while the social environment into which they are born is like the soil. Education is the process that enables this hereditary seed to sprout, flourish, and grow into a tree through the influence of environmental conditions. Teachers should categorize children based on their hereditary strengths and aptitudes, grouping them accordingly to provide education tailored to their interests. In this regard, teachers should consider the following points:
- A primary duty of education is to provide an environment conducive to reaching the maximum potential set by heredity.
- Teachers should not expect uniform levels of achievement from all students.
- One should not assume that everyone raised in the same household shares the exact same environment, nor that all siblings will be alike.
- Educational strategies must be designed with the understanding that a single environment does not exert the same influence on everyone.
- It is a teacher’s foremost duty to identify each student’s latent potential and provide an environment that allows these abilities to fully blossom.
- Teachers must create a school environment that fosters the physical, intellectual, and social development of students coming from diverse family backgrounds. • An environment conducive to intellectual and social development, as well as the all-round growth of students, must be provided.
A child’s personality is like a magnificent edifice; if heredity forms the foundation, the environment constitutes the pinnacle. Therefore, it is everyone’s duty to ensure that a child’s innate hereditary potential is neither squandered nor stunted due to a lack of opportunities or a poor environment.
