Help with two multiple choice questions please? 1.The allele frequencies for a p
ID: 267611 • Letter: H
Question
Help with two multiple choice questions please?
1.The allele frequencies for a population are A = 0.6 and a = 0.4. Conditions change and fitness values are now AA = 0.3, Aa = 0.7 and aa = 1.0. What is the allele frequency of A in the next generation?
A.
between 0.5 and 0.6
B.
between 0.4 and 0.5
C.
between 0.6 and 0.7
D.
0.6
E.
between 0.3 and 0.4
2. The allele frequencies for a population are A = 0.6 and a = 0.4. Conditions change and fitness values are now AA = 0.3, Aa = 0.7 and aa = 1.0. What is the mean fitness of the population?
A.
0.4
B.
0.3
C.
0.7
D.
0.5
E.
0.6
A.
between 0.5 and 0.6
B.
between 0.4 and 0.5
C.
between 0.6 and 0.7
D.
0.6
E.
between 0.3 and 0.4
Explanation / Answer
1.The allele frequencies for a population are A = 0.6 and a = 0.4. Conditions change and fitness values are now AA = 0.3, Aa = 0.7 and aa = 1.0. What is the allele frequency of A in the next generation?
The answer is
Genotype
Frequencies before fitness
Fitness value
After fitness frequencies of genotypes
AA
= 0.6*0.6 = 0.360
0.3
= 0.360 *0.30 = 0.108
Aa
= 2*0.6*0.4 = 0.480
0.7
= 0.480 *0.7 = 0.336
aa
= 0.4*0.4 = 0.160
1.0
= 0.160 *1 = 0.16
The allele frequency in next generation :
Genotype
Freequency
Allele A
Allele a
Total
AA
0.108
0.216
0
0.216
Aa
0.336
0.336
0.336
0.672
aa
0.16
0
0.32
0.32
Total
0.604
0.552
0.656
1.208
Allele A
= 0.552/1.208
0.46
Allele a
= 0.656/1.208
0.54
The allele frequency of A in the next generation = 0.46 : B. between 0.4 and 0.5
ACCORDING TO CHEGG GUIDELINES WE HAVE TO ANSWER ONE QUESTION AT A TIME. POST THE REST AS SPERATE QUESTIONS, THEN I CAN HELP YOU.
Genotype
Frequencies before fitness
Fitness value
After fitness frequencies of genotypes
AA
= 0.6*0.6 = 0.360
0.3
= 0.360 *0.30 = 0.108
Aa
= 2*0.6*0.4 = 0.480
0.7
= 0.480 *0.7 = 0.336
aa
= 0.4*0.4 = 0.160
1.0
= 0.160 *1 = 0.16
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