Question

Populations evolve for many reasons. Suppose there is a population of plants that have either purple flowers or white flowers, and the allele for purple flowers is dominant. This means that plants with two purple alleles have purple flowers. Plants with one purple allele and one white allele also have purple flowers. Only plants with two white alleles have white flowers.For each event or condition described below, answer the following questions.

O What mechanism? Identify whether the event is natural selection, genetic drift, or gene flow.
O Gene pool effect. Select the best description of how the allele frequencies change.
A. During an extreme heat wave, plants with white flowers survive better.
What mechanism is in work here?
O natural selection
O genetic drift
O gene flow
What is the effect on the gene pool?
O frequency of purple alleles increase
O allele frequencies change, but not predictably
O frequency of white alleles increase
O allele frequencies stay the same
B. A person uproots the five closest plants, which all happen to have white flowers.
What mechanism is in work here?
O natural selection
O genetic drift
O gene flow
What is the effect on the gene pool?
O frequency of purple alleles increase
O allele frequencies change, but not predictably
O frequency of white alleles increase
O allele frequencies stay the same

Answer 1

I will answer the question accordingly so that it help you under stand it better.

Question A.

During an extreme heat wave, plants with white flowers survive better.

What mechanism is in work here?

Answer: Mechanism of Natural Selection will work here. This is called survival of the fittest which means the best color which fits in harsh conditions will dominate over others and will survive for longer time.

What is the effect on the gene pool?

Answer: The Frequency of white allele will increases because white color is the best fit to extreme heat wave.

Question B.

A person uproots the five closest plants, which all happen to have white flowers.

What mechanism is in work here?

Answer: The mechanism of gene flow will work here as color of flower represents genotype of flower.

What is the effect on the gene pool?

Answer: The Frequency of white allele will increases because genotype of white flowers is increased.