Question

Pea plants have either purple or white flowers, where purple is dominant. What cross would guarantee the offspring plants have only white flowers? (1 point)

Both parents would be homozygous dominant

Both parents would be heterozygous.

Both parents would be homozygous recessive.

One parent is homozygous dominant, and one would be homozygous recessive.

Answer 1

To guarantee that the offspring plants have only white flowers, the correct cross would be:

**Both parents would be homozygous recessive.**

This means both parents would have the genotype "pp," where "p" represents the recessive allele for white flowers. Since both parents are homozygous recessive, all offspring will also have the genotype "pp" and will express the trait for white flowers.

However, if you are looking for the option that guarantees the offspring will have white flowers, the best choice from your list is:

**One parent is homozygous dominant, and one would be homozygous recessive.**

In this case, the homozygous dominant parent (PP) crosses with the homozygous recessive parent (pp), producing all heterozygous offspring (Pp), which would still show the purple flower trait because purple is dominant.

Thus, the best choice ensuring only white flowers is:

**Both parents would be homozygous recessive** (pp).