Question

carla receives an allele for blue eyes from her mother, and an allele for brown eyes from her father.
if brown eye color is a dominant trait and blue eye color is a recessive trait, what can be determined about the color of carlas
eyes?
o a. carla has blue eyes.
o b. carla has green eyes.
o c. carla has brown eyes.
o d. carlas eye color can not be determined.
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Explanation:

已知棕色眼睛是显性性状（用\(B\)表示），蓝色眼睛是隐性性状（用\(b\)表示）。Carla从母亲得到蓝色眼睛等位基因（\(b\)），从父亲得到棕色眼睛等位基因（\(B\)），那么Carla的基因型是\(Bb\)。根据显性性状的定义，只要有显性基因（\(B\)）存在，就会表现出显性性状（棕色眼睛）。

Answer:

C. Carla has brown eyes.