Question

characters in humans such as a persons red and white blood cell counts vary quite a bit depending on such factors as altitude and physical activity. traits like this are referred to as...

polygonic.

completely dominant.

recessive.

multifactorial.

Explanation:

• Polygenic traits are determined by multiple genes. While this trait may involve genetic factors, the key here is the influence of non - genetic factors (altitude, physical activity) in addition to genetics.
• Completely dominant refers to a simple Mendelian inheritance pattern where one allele masks the effect of another. This does not account for environmental influences.
• Recessive also pertains to simple Mendelian inheritance and does not consider environmental factors.
• Multifactorial traits are influenced by both genetic and environmental factors. Since the red and white blood cell counts are affected by factors like altitude (environmental) and likely have a genetic basis (as blood cell production is a biological process with genetic regulation), this is the most appropriate term.

Answer:

multifactorial.