Question

a true breeding purple flower plant crossed with a true breeding white flower plant will produce-
mostly purple flower plants
all purple flower plants
no purple flower plants
all white flower plants
pink flower plants

Explanation:

True - breeding plants are homozygous for a trait. If purple is dominant (let's assume the purple allele is \( P \) and white is \( p \)), the true - breeding purple plant has genotype \( PP \) and the true - breeding white has \( pp \). When crossed (\( PP\times pp \)), all offspring will have the genotype \( Pp \). If purple is dominant over white, the \( Pp \) genotype will express the purple phenotype. So all offspring will be purple - flowered plants.

Answer:

B. all purple flower plants (assuming the option labels are A. mostly purple flower plants, B. all purple flower plants, C. no purple flower plants, D. all white flower plants, E. pink flower plants)