Context: This passage describes the Bekko patterning trait in koi fish:
The Bekko pattern is a pattern of colors found on the bodies of some koi fish. A koi fish with Bekko patterning has black patches all over its body. A koi fish without Bekko patterning does not have these patches.
In a group of koi fish, some individuals have Bekko patterning and others do not. In this group, the gene for the Bekko patterning trait has two alleles. The allele for having Bekko patterning (B) is dominant over the allele for not having Bekko patterning (b).
This Punnett square shows a cross between two koi fish.
What is the probability that a koi fish produced by this cross will have Bekko patterning?
A. 4/4
B. 3/4
C. 2/4
D. 0/4
E. 1/4
From the given choices, pick the correct answer and respond by indicating the letter of the correct option.
Answer: A