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 Carla's eyes?
Question 1 options:

A.Carla has blue eyes.


B.Carla's eye color can not be determined.


C.Carla has green eyes.


D.Carla has brown eyes.

Answer 1

D. Carla will have brown eyes due to the dominant trait from the Father, you can do a Punnett Square to determine the result :)

Answer 2

The correct answer is option D, Carla has brown eyes

Reason -

Let the allele for blue colour of eyes be represented by b

And the allele for Brown colour of eyes be represented by B

Now when it is said that Carla receives an allele for blue eyes from her mother, and an allele for brown eyes from her father.

A mother can have blue colour eyes only when both its allele are recessive, thus the genotype of mother would be Xb Xb

Lets take fathers genotype as XB YB

A cross between the two will produce two female offspring with genotype of XB Xb

Since brown is dominant over blue existence of two allele together will result into the colour of dominant allele

Thus, Calra would have brown eyes