In tigers a recessive allele causes a white tiger.If two phenotypically normal tigers are mated and produce a white offspring,what percentage of their remaining offspring is expected to be white?
A) 50%
B) 25%
C) 100%
D) 0%
E) Unable to determine based upon the information given

Question

Quizplus · Accepted Answer

The two tigers must both be carriers of the recessive allele for white fur in order to produce a white offspring. This means that each of them must have one copy of the recessive allele (represented by "w") and one copy of the dominant allele (represented by "W").

The Punnett square for this cross would look like this:

W    W
    ------------------
  W | WW | WW |
  -------
  w | Ww | Ww |

Each of the offspring has a 25% chance of inheriting two copies of the recessive "w" allele and thus being white. Therefore, the expected percentage of white offspring is 25%.

In Tigers a Recessive Allele Causes a White Tiger