Question 4 (1 point) what percentage of muscle strength is estimated to be determined by genetic factors \( 20 \% \) \( 50 \% \) \( 75 \% \) \( 100 \% \)

To determine the percentage of muscle strength that is estimated to be determined by genetic factors, we can analyze the options provided: 1. **20%** - This suggests that a small portion of muscle strength is influenced by genetics. 2. **50%** - This indicates a moderate influence of genetics on muscle strength. 3. **75%** - This suggests that a significant majority of muscle strength is determined by genetic factors. 4. **100%** - This implies that muscle strength is entirely determined by genetics, leaving no room for environmental or training factors. Research in the field of genetics and muscle strength suggests that genetic factors play a substantial role, but they do not account for all variations. The commonly accepted estimate is that genetic factors account for about **50% to 75%** of muscle strength. Given the options, the most accurate estimate is likely **75%**. Thus, the answer is: **75%**