Question

to find out what happened when mendel crossed purebred purple-flowered and a white-flowered pea plants, you’re going to need to recreate that cross. but how do you know if a plant is purebred, exactly? to prevent any other unwanted traits from appearing in later generations, we want to find true breeding purple-flowered and white-flowered pea plants to cross. an organism with a true breeding trait is one whose ancestors (and offspring) all had/have that same trait. select two family trees: one that represents purebred white pea plants and one that represents purebred purple-flowered plants. 1. impure white-flowered plant 2. pure purple-flowered plant 3. impure purple-flowered plant 4. pure white-flowered plant

Explanation:

To determine the purebred family trees, we use the definition of true - breeding (ancestors and offspring have the same trait). For purebred purple - flowered plants, all the plants in the family tree should have purple flowers. Looking at the options, option 2 (Pure purple - flowered plant) has only purple - flowered plants. For purebred white - flowered plants, all the plants in the family tree should have white flowers. Option 4 (Pure white - flowered plant) has only white - flowered plants. Options 1 and 3 have a mix of flower colors, so they are impure.

Answer:

1. Pure purple - flowered plant, 4. Pure white - flowered plant