One True-Breeding Line of Mice Is Obese and Dark, and the Other

question 3

Multiple Choice

One true-breeding line of mice is obese and dark, and the other true-breeding line is lean and light.Dark is dominant to light, but obese and lean exhibit incomplete dominance.The two genes involved are on separate chromosomes.What proportion of offspring from a dihybrid cross should be dark and obese?

• A) 1/16
• B) 3/16
• C) 1/4
• D) 3/8
• E) 9/16

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