On my homework there's a diagram of a flying bird with the allele of aa and then there's an arrow pointing to the land with 3 birds on the ground with the alleles AA. What would the allele frequency of A change from?
A)1 to .75
B)0 to .25
C)0 to .75
D)1 to .25
To determine the change in allele frequency from aa to AA individuals, we need to examine how the alleles are inherited in the given scenario.
In this case, the flying bird has the genotype aa, while the birds on the ground have the genotype AA.
There are a total of four birds in the scenario - one flying bird (aa) and three birds on the ground (AA). Since each bird carries two alleles (one from each parent), there are eight alleles in total.
From the given information, we can see that the flying bird has the allele a (aa), and the birds on the ground have the allele A (AA).
Calculating the allele frequency involves determining the proportion of a particular allele within the population.
To calculate the initial allele frequency, we use the formula:
Allele frequency = Number of copies of the allele / Total number of alleles
Initial allele frequency of a (allele aa):
Number of copies of allele a (aa) = 2 (from the flying bird)
Total number of alleles = 8 (4 birds × 2 alleles per bird)
Initial allele frequency of a (aa) = 2/8 = 0.25
Similarly, to calculate the final allele frequency, we use the same formula:
Final allele frequency of A (allele AA):
Number of copies of allele A (AA) = 6 (from the birds on the ground)
Total number of alleles = 8 (4 birds × 2 alleles per bird)
Final allele frequency of A (AA) = 6/8 = 0.75
Therefore, the change in allele frequency from aa to AA is:
Final allele frequency of A (AA) - Initial allele frequency of a (aa) = 0.75 - 0.25 = 0.50
So, the correct answer would be A) 1 to .75, as it represents the change in allele frequency from 1 (initial frequency of a) to 0.75 (final frequency of A).