What is it called when genes are affected by environment?
Positive experiences, such as exposure to rich learning opportunities, and negative influences, such as malnutrition or environmental toxins, can change the chemistry that encodes genes in brain cells — a change that can be temporary or permanent. This process is called epigenetic modification.
How does the environment affect genes?
Environmentally induced changes in gene expression occur when exposure to chemicals changes which genes are turned “on” or “off”—which can change how the cells function and thus a person’s predisposition to disease. The effect of this chemical modification is called epigenetic regulation.
Which is an example of environmental influence on gene expression?
Drugs and Chemicals
The presence of drugs or chemicals in an organism’s environment can also influence gene expression in the organism. Cyclops fish are a dramatic example of the way in which an environmental chemical can affect development.
What is influenced both by genes and by environmental factors?
Like most aspects of human behavior and cognition, intelligence is a complex trait that is influenced by both genetic and environmental factors. … Elements of intelligence include the ability to reason, plan, solve problems, think abstractly, and understand complex ideas.
What is it called when one gene influences multiple phenotypes?
The term pleiotropy is derived from the Greek words pleio, which means “many,” and tropic, which means “affecting.” Genes that affect multiple, apparently unrelated, phenotypes are thus called pleiotropic genes (Figure 1).
Which of these is an example of an environmental effect on phenotype?
Environmental conditions, such as temperature and availability of nutrients can affect phenotypes. For example, temperature affects coat color in Siamese cats. … Height in humans is a complex phenotype influenced by many genes, but it is also influenced by nutrition.
Which is an example of environmental influence on gene expression quizlet?
Environmental factors can affect gene expression such as: the production of skin pigmentation during exposure to sunlight in humans. In embryonic development, the embryo contains an uneven distribution of chemicals called morphogens.
What environmental influences mean?
1 external conditions or surroundings, esp. those in which people live or work. 2 (Ecology) the external surroundings in which a plant or animal lives, which tend to influence its development and behaviour. 3 the state of being environed; encirclement.