The table below provides information about a population in which natural selection acts on a single-genetic trait.
Frequency of Alleles
Year
Frequency of Allele B
Frequency of Allele b
1910
0.81
0.19
1930
0.49
0.51
1950
0.25
0.75
1970
0.10
0.90
What can be inferred from the information in the table?
Diversity in the gene pool increased over time.
Allele B was dominant in 1910 but became the recessive allele over time.
The frequency of both alleles in this population decreased from 1910 to 1970.
From 1910 to 1970 the likelihood of surviving was higher for individuals with Allele b.
Allele B was dominant in 1910 but became less common over time, with the frequency of allele b increasing. This suggests that natural selection favored individuals with allele b, leading to a decrease in the frequency of allele B over time. Therefore, option B is the correct inference.
The table below provides information about a population in which natural selection acts on a single-genetic trait.
Frequency of Alleles
Year
Frequency of Allele B
Frequency of Allele b
1910
0.81
0.19
1930
0.49
0.51
1950
0.25
0.75
1970
0.10
0.90
What can be inferred from the information in the table?
A. Diversity in the gene pool increased over time.
B. Allele B was dominant in 1910 but became the recessive allele over time.
C. The frequency of both alleles in this population decreased from 1910 to 1970.
D. From 1910 to 1970 the likelihood of surviving was higher for individuals with Allele b.
Allele b became more common in the population over time, suggesting that natural selection favored individuals with allele b. Therefore, option D is the correct inference.
is the answer b or d
The answer is D.
To analyze the information in the table and determine what can be inferred, we need to track the changes in allele frequencies over time.
First, let's look at the frequencies of Allele B in the population. In 1910, the frequency of Allele B was 0.81, which was the highest among the four years. However, as we move forward in time, the frequency of Allele B decreases to 0.49 in 1930, then to 0.25 in 1950, and finally to 0.10 in 1970. This indicates a significant decline in the frequency of Allele B over the years.
On the other hand, let's examine the frequencies of Allele b in the population. In 1910, the frequency of Allele b was 0.19, which was the lowest among the four years. However, as we progress through time, the frequency of Allele b increases to 0.51 in 1930, then to 0.75 in 1950, and finally to 0.90 in 1970. This indicates a substantial increase in the frequency of Allele b over the years.
From these observations, we can infer that the diversity in the gene pool increased over time. Initially, Allele B was more prevalent, but it became less common as Allele b increased in frequency. Therefore, we can exclude options 2 and 3 from the answer choices.
Since the frequency of Allele b increases while Allele B decreases, it suggests that individuals with Allele b had a higher likelihood of surviving from 1910 to 1970. Hence, the most likely inference based on the information provided is that from 1910 to 1970, the likelihood of surviving was higher for individuals with Allele b. Therefore, option 4 is the correct answer.