SEHS Topic 12 (12.1.2-12.1.3) short answer quiz

What are factors that can switch on and off your genes?

Answer explanation

Factors that can switch on and off your genes include environmental influences, lifestyle choices, and epigenetic modifications. These factors can affect gene expression without altering the DNA sequence itself.

What are the internal factors which turn genes on/off?

Answer explanation

Internal factors that turn genes on/off include blood sugar, growth and hormones. These elements interact with DNA to regulate gene expression, influencing when and how genes are activated or repressed.

What are the external factors which turn genes on/off?

Answer explanation

External factors that turn genes on/off include environmental signals, hormones, nutrients, and stressors. These factors can influence gene expression by interacting with regulatory elements in the DNA.

What is the impact of the ACTN3 gene on performance?

Answer explanation

The ACTN3 gene influences muscle performance, particularly in sprinting and power activities. Variants of this gene can determine an individual's predisposition to excel in explosive strength sports.

Discuss the link between genetic characteristics and environmental factors.

Answer explanation

Genetic characteristics influence how organisms respond to environmental factors. For example, certain traits may enhance survival in specific habitats, demonstrating the interplay between genetics and environment in shaping species.

Is there a single superior 'Sport Gene' that determines athletic ability?

Answer explanation

No, athletic ability is influenced by multiple genes, environmental factors, and training. There isn't a single 'Sport Gene' that determines overall athletic performance.