l Sprint LTE 11:28 PM uic.blackboard.com 68% The eye color of a certain type of

ID: 195760 • Letter: L

Question

l Sprint LTE 11:28 PM uic.blackboard.com 68% The eye color of a certain type of fruit fly is determined by one gene with two alleles, B and b. In a population of S00 fruit flies, you see the following phenotypes: BB Bb bb Red eye color White eye color Sepia eye color 72 254 174 1. Calculate the allele frequencies of B. (3 pts.) 2. Calculate the allele frequencies of b. (3 pts.) Albinism (white fur) in lions is caused by a deletion mutation in the OCAl allele. Individuals with a homozygous recessive allele combination appear as a white coat color. A population in Sahara Desert had 15 albino individuals and 57 normal lions, The population in South Africa had 0 albino individuals and 159 normally colored lions. What is the frequency of the albino allele in each population? Show your work. Calculate your answer to 4 decimal places. 3. Frequency of albino allele in Sahara Desert pop: 3 pts.) 4. Frequency of albino allele in Toronto pop: 3 pts.) Tay-Sachs disease is caused by receiving two copies of a recessive allele at the HEXA gene locus. Mutations in the HEXA gene disrupt the activity of an enzyme called beta-hexosaminidase A, preventing it from breaking down a fatty substance known as GM2 ganglioside.

Explanation / Answer

1, 2: The eye color of certain…following phenotypes:

The answer is

The allele frequencies are

Phenotype

Genotype

Freequency

Allele B

Allele b

Total

Red

144

White

254

508

Sepia

174

348

Total

500

398

602

1000

Allele B

= 398 / 1000

=0.398 ~ 0.40

Allele b

= 602 /1000

=0.602 ~ 0.60

1. The answer is

Allele B = 0.40

2. The answer is

Allele b = 0.60

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