Genes and Environment Practice Test

Two strains of the same fish species have different inherited traits: Strain F (fast-growth trait) and Strain M (moderate-growth trait). They are raised for 3 months in two environments: Warm water (24°C) and Cool water (16°C). Evidence of average mass gain is shown:

• Warm water: Strain F = 40 g, Strain M = 28 g
• Cool water: Strain F = 18 g, Strain M = 16 g

Which statement is supported by the evidence about genes, environment, and interaction?​

Two inherited types of the same mushroom are grown: Type A (larger-cap trait) and Type B (smaller-cap trait). They are grown in two environments: Cooler (15°C) and Warmer (25°C). Evidence after 7 days (average cap diameter):

• 15°C: Type A = 6.0 cm, Type B = 4.5 cm
• 25°C: Type A = 7.0 cm, Type B = 6.8 cm

Which explanation best uses the evidence to describe gene–environment interaction on growth?​