HSA 2007 Biology Item 45
- CID
- CID5d2d001b4b72d18b5af4043623735f7c
- itemNum
- 45
- initialLetter
- A
- itemType
- SR
- itemAnswerKey
- 1
- itemMaxScorePoints
- 1
- origNum
- x
Use the information and Punnett square below to answer the following question.
In guinea pigs, the allele for black fur (B) is dominant. The allele for brown fur (b) is recessive. Two guinea pigs were crossed as shown in the Punnett square below. Numbers 1, 2, 3, and 4 represent the types of offspring produced from the cross.
What is the probability that an offspring from this cross would have brown fur?
- 0%
- 25%
- 50%
- 75%