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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Definitions:

Uterine Fibroids

Noncancerous growths in the uterus that can cause pain, heavy menstrual bleeding, and other symptoms in women.

Obesity

A medical condition characterized by the accumulation of excess body fat to the extent that it may have a negative effect on health, leading to increased risks of various diseases and health problems.

Sudden Unexpected

Events or occurrences that take place without warning and are unforeseen or unanticipated.

Infant Deaths

The demise of a baby before his or her first birthday, often caused by birth defects, preterm birth, maternal complications, or Sudden Infant Death Syndrome (SIDS).