Which is an environmental factor influencing the expression of a genetic trait?
Environmental factors such as diet, temperature, oxygen levels, humidity, light cycles, and the presence of mutagens can all impact which of an animal’s genes are expressed, which ultimately affects the animal’s phenotype.
How does the environment influence 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.
Which of the following is a factor that influence gene expression?
What are some environmental factors that can influence gene expression? Temperature, nutrition, light, chemicals, infectious agents, age, and gender/sex.
What factors can influence the expression of a trait?
Various factors, including genetic makeup, exposure to harmful substances, other environmental influences, and age, can affect expressivity. Both penetrance and expressivity can vary: People with the gene may or may not have the trait and, in people with the trait, how the trait is expressed can vary.
How does environmental factors affect the expression of a trait?
Internal and external environmental factors, like gender and temperature, influence gene expression. … Similarly, drugs, chemicals, temperature, and light are among the external environmental factors that can determine which genes are turned on and off, thereby influencing the way an organism develops and functions.
How do environmental factors affect genetic variation?
These results suggest that ecological factors can have strong impacts on both population size per se and intrapopulation genetic variation even at a small scale. On a more general level, our data indicate that a patchy environment and low dispersal rate can result in fine-scale patterns of genetic diversity.
What is the role of the promoter in gene expression quizlet?
The promoter: the place where RNA polymerase binds. The operator: an “on-off switch” to control transcription of the enzyme-coding genes. … Operons have all of the related genes on one promoter.
How is gene expression regulated by proteins Bioninja?
Gene expression is regulated by proteins that bind to specific base sequences in DNA. The environment of a cell and of an organism has an impact on gene expression.
What do cells contain that turn genes on or off?
The gene regulatory proteins allow the individual genes of an organism to be turned on or off specifically. Different selections of gene regulatory proteins are present in different cell types and thereby direct the patterns of gene expression that give each cell type its unique characteristics.
What are environmental factors?
Environmental factors include temperature, food, pollutants, population density, sound, light, and parasites. The diversity of environmental stresses that have been shown to cause an increase in asymmetry is probably not exclusive; many other kinds of stress might provide similar effects.
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.
What are the environmental factors that influence child development?
Environmental factors that influence growth and development in humans include childhood housing arrangements, family income, educational opportunities, interpersonal relationships and employment-related factors, according to Best Start, Ontario’s Maternal Newborn and Early Child Development Resource Centre.
What is genetic and environmental factors?
= Gene environment interaction is an influence on the expression of a trait that results from the interplay between genes and the environment. Some traits are strongly influenced by genes, while other traits are strongly influenced by the environment.
How do genetic and environmental factors work together to influence temperament?
Similar temperaments within a family may be attributable to shared genetics and to the environment in which an individual is raised. … Instead, many (perhaps thousands) of common gene variations (polymorphisms) combine to influence individual characteristics of temperament.