1) If you are told 9.8% of the population suffers from arecessive condition, what is the frequency of the dominant allele(rounded to three decimal places)?
2)In Labrador Retrievers, the coat colour is controlled by 2loci. If we consider only the locus that controls the black orchocolate colours and we observe that of the 415 labs that areeither black or chocolate, 390 of them are black and (415 - 390)are chocolate. What is the frequency of the recessive chocolateallele (two decimal places)?
1) If you are told 9.8% of the population suffers from arecessive condition, what is the frequency of the dominant allele(rounded to three decimal places)?
2)In Labrador Retrievers, the coat colour is controlled by 2loci. If we consider only the locus that controls the black orchocolate colours and we observe that of the 415 labs that areeither black or chocolate, 390 of them are black and (415 - 390)are chocolate. What is the frequency of the recessive chocolateallele (two decimal places)?
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For simplicity, we will assume that golden manes (G) are dominant over black manes (g), and thick manes (T) are dominant over thin (t).(In reality, the inheritance of these traits is a lot more complex and lions exhibit a range of mane colours from golden to brown to dark brown to black â but here we will keep it simple.)
| Phenotype | Number of lions | |
| Locus 1: Mane Colour | Golden | 821 |
| Black | 211 | |
| Locus 2: Mane Density | Thick | 354 |
| Thin | 678 |
(i) The frequency of black manes: 0.204
(ii) The frequency of golden manes: 0.795
(i) The frequency of thick manes: 0.343
(ii) The frequency of thin manes: 0.656
| Locus | Genotypes | Phenotypes |
| T (Mane Thickness) | TT | Thick |
| Tt | Thick | |
| tt | Thin | |
| G (Mane Colour) | GG | Golden |
| Gg | Golden | |
| gg | Black |
Assuming the African population is in Hardy-Weinberg equilibrium for the two loci, what are the observed frequencies of each allele (G, g, T and t) in this lion population?
Round your answer to three decimal places and submit your answer in the correct format (e.g. 0.062).
(a) Frequency of the G allele = ---------------------------
(b) Frequency of the g allele = ----------------------------
(c) Frequency of the T allele =----------------------------
(d) Frequency of the t allele = ----------------------
For simplicity, we will assume that golden manes (G) are dominant over black manes (g), and thick manes (T) are dominant over thin (t).(In reality, the inheritance of these traits is a lot more complex and lions exhibit a range of mane colours from golden to brown to dark brown to black â but here we will keep it simple.)
(i) The frequency of black manes: 0.204
(ii) The frequency of golden manes: 0.795
(i) The frequency of thick manes: 0.343
(ii) The frequency of thin manes: 0.656
| Locus | Genotypes | Phenotypes |
| T (Mane Thickness) | TT | Thick |
| Tt | Thick | |
| tt | Thin | |
| G (Mane Colour) | GG | Golden |
| Gg | Golden | |
| gg | Black |
Assuming the African population is in Hardy-Weinberg equilibrium for the two loci, what are the observed frequencies of each allele (G, g, T and t) in this lion population?
Round your answer to three decimal places and submit your answer in the correct format (e.g. 0.062).
(a) Frequency of the G allele = ---------------------------
(b) Frequency of the g allele = ----------------------------
(c) Frequency of the T allele =----------------------------
(d) Frequency of the t allele = ----------------------
Based on the allele frequencies you calculated above (in Question 2), answer the following questions.Round your answers to the nearest whole number (because you cannot have part of a lion!).
(a) Locus 1: Mane colour
(i) How many lions would you expect to be heterozygous for mane colour (i.e. Gg)? -----------------------------
(ii) How many lions would you expect to be homozygous dominant for mane colour (i.e. GG)? ----------------------
(iii) How many lions would you expect to be homozygous recessive for mane colour (i.e. gg)? ------------------
(b) Locus 2: Mane Thickness
(i) How many lions would you expect to be heterozygous for mane thickness (i.e. Tt)? --------------
(ii) How many lions would you expect to be homozygous dominant for mane thickness (i.e. TT)?--------------------
(iii) How many lions would you expect to be homozygous recessive for mane thickness (i.e. tt)? ----------------
