Question

A rose plant inherited two alleles for white flower petals.

Which conclusion is best supported by the given information?

Each parent had at least one allele for white petals.
Each parent must have had more than one allele for white petals.
Only one parent had one allele for white petals.
Only one parent had two alleles for white petals.

Answer 1

Answer: Each parent had at least one allele for white petals.

Explanation: A diploid offspring gets one allele from each parent. If the plant has two white-petal alleles, both parents must have provided a white allele, so each parent had at least one white allele.