Question

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a botanist came across a species of plant that has two varieties of flower color: purple and white. the botanist wanted to complete several genetic crosses to determine the relationship between the two alleles. upon crossing the different plants, the greatest majority of them were purple.
given this information, select the statements that accurately reflect conclusions that can be made about the alleles for this trait.
a plant that has purple flowers can still carry an unexpressed allele for white flowers.
in order for a plant to have white flowers, it must inherit the allele for white flowers from both parents.
the allele for purple flowers is dominant to the allele for white flowers.
in order for a plant to have purple flowers, it must inherit the allele for purple flowers from both parents.
the allele for white flowers is dominant to the allele for purple flowers.

Explanation:

The majority purple offspring indicates purple is dominant. Dominant alleles mask recessive ones, so purple plants can be heterozygous (carry white allele). Recessive white flowers require two copies (homozygous recessive), so they need the allele from both parents. Purple plants only need one dominant allele, so they don’t need it from both parents. White can’t be dominant if most offspring are purple.

Answer:

A plant that has purple flowers can still carry an unexpressed allele for white flowers., In order for a plant to have white flowers, it must inherit the allele for white flowers from both parents., The allele for purple flowers is dominant to the allele for white flowers.