Questions tagged [hardy-weinberg]
A model for allele and genotype frequencies in a non-evolving population.
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For allele frequency determination, is it good to take samples from a college/school or a hospital or any other technique?
I am trying to determine allele frequency of a hla allele. Preliminary analysis shows the prevalence of the allele (homo or heterozygous both) is 3%. The allele is related to a disease (After exposure ...
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Finding intensity of selection against dominant homozygotes
I was looking at some Olympiad questions and came across the following:
If the frequency of a completely recessive allele is $0.2$ and it remains unchanged from generation to generation due to ...
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2answers
371 views
What is difference between Incest and Inbreeding? [closed]
Are they the same? As both are related to sexual activity between close relatives.
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1answer
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Linkage between chromosomal loci and the Hardy-Weinberg principle
Referring to the Hardy-Weinberg principle, which is always stated with respect to a particular locus on the chromosome, if we observe that two different loci are either always together in Hardy-...
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1answer
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How many birds in this population would be expected to have either red or white feathers?
Question: The red and white feather pattern of a bird is determined by a gene that has two alleles, band R and W,which show codominance. Some birds have completely red feathers (RR),some parrots ...
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2answers
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What are the differences in the two possible methods to calculate the Hardy-Weinberg Equation?
I am more than flabbergasted by calculations of Hardy-Weinberg equilibria. The formula's theory assumes a binomal distribution of allele frequencies in a population, and hence allows the comparison of ...
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2answers
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Finding for evolution, comparing past flower numbers with present
In a hypothetical species of butterfly, wing spots are controlled by a single locus where BB individuals have blue spots, YY individuals have yellow spots, and BY individuals have green spots. Ten ...
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Hardy-Weinberg sex linked formula
The "big five" assumptions are the ones listed in the main text. However, the basic formulation of Hardy-Weinberg equilibrium also relies on a few other assumptions;
Allele and genotype frequencies ...
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Hardy Weinberg Explanation
I am able to calculate frequencies for allele and genotype, but I don't understand how to tell if the population is at equilibrium. Or how to determine how many generations of random mating would be ...
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1answer
286 views
Hardy-Weinberg for triploids
Problem:
A certain species has somatic cells with ploidy 3n (the organism inherits
three sets of homologous chromosomes from each of three parents). At a certain locus, there are three possible ...
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1answer
161 views
Reducing the Proportion of Phenotype in Hardy Weinberg Population through Selection
I was given the following question:
You travel to an unknown island and find a population of strangely colored
slugs! Upon close investigation, you notice that 16% of the slugs have a
shriveled tails,...
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1answer
124 views
Re-establishment of Hardy Weinberg Equilibrium After Selection
I have been given this question:
In a population of 2500 mice, light-colored fur is dominant to dark-colored fur. 2400 mice originally have light-colored fur. However, an owl species moves into ...
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2answers
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Frequency of dominant phenotype (Hardy-Weinberg)
The question is:
The frequency of a recessive allele a is 0.6. If a population is in Hardy-Weinberg equilibrium, what is the frequency of the dominant phenotype?
This question is a bit confusing to ...
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2answers
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Solving Hardy Weinberg problems
I really fail to understand Hardy-Weinberg equilibrium and can't find an easy enough source of information.
Can you help me to understand Hardy-Weinberg equilibrium?
My goal is to be able to solve ...
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0answers
50 views
How do I solve this problem related to specificity and sensitivity?
Consider an autosomal recessive disease with an incidence of 1/10,000 in
the general population of 100,000. Your best friend comes to you very
upset because he has just taken a screening test for this ...
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1answer
250 views
Hardy Weinberg equilibrium [closed]
Hardy Weinberg would predict that the frequency of normal females, to carrier females,
to affected females for colorblindness is equal to p$^2$ + 2pq + q$^2$=1. You
were told that q=freq of the ...
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1answer
155 views
Hardy Weinberg principle
The principle is that sum total of all allelic frequencies is 1.
Individual frequencies for example can be named p,q.In a diploid cell , p and q represent the frequency of allele A and a respectively ...
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1answer
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Calculating the frequency of a recessive allele in case of three segregating alleles
Is it correct to say:
A. f(A) = p; f(a) = q
B. p = f(AA) + ½ f(Aa)=$\sqrt{f(AA)}$?
Also,
For a gene locus segregating more than two alleles, the frequency of
each allele is the frequency of ...
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2answers
177 views
Is this a simple Hardy-Weinberg problem?
Phenylketonuria is a severe developmental disability due to a rare autosomal recessive allele. Approximately 1 in every 10,000 newborns suffer from this disease. Calculate the frequency of the allele ...
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2answers
375 views
Disease causing variants and Hardy-Weinberg Equilibrium
Is it true that many disease causing variants/mutations do not follow Hardy Weinberg Equilibrium? If so, then please elaborate on why this may be true (or not) and provide examples.
I am interested ...
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Evolution of a Population
Scientists observe a newly established population of sexually reproducing plants growing on the shore of a small island. An observable trait of the plant has two possible phenotypes. It is determined ...
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1answer
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Hardy-Weinberg Equilibrium Question
I have four questions concerning H-W Equilibrium:
(i) In a population of mice, the presence of black spots is the result of a homozygous recessive condition. If the frequency of the allele for this ...
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3answers
343 views
Why is it $q^2$ for the individual count in hardy weinberg?
My understanding:
In Hardy-Weinberg problems the frequency of a homozygous recessive genetic occurrence in a population is $q^2$. So if 1 in 100 people in a population have albinism (homozygous ...
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1answer
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Recessive alleles at Hardy-Weinberg equilibrium
I've run into a question that I disagree with others on but I would like to receive the input of others. The question is:
If a population is at Hardy-Weinberg equilibrium, which of the following can ...
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1answer
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Hardy-Weinberg Color-blind
In a city, 4% of male population have color blindness. How many of the female are (a) color blind carrier, (b) color blind? Suppose the city holds Hardy Weinberg equilibrium.
My progress: 4% of male ...
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1answer
977 views
Hardy Weinberg problem help!
The three common genotypes at the hemoglobin locus have very different phenotypes: SS individuals suffer from severe anemia, AS individuals have a relatively mild form of anemia but are resistant to ...
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4answers
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X Linked Hardy Weinberg Equilibrium Problem
In a given population under Hardy Weinberg equilibrium, 40.0% of men have hemophilia. What is the probability that a random man and random woman will have a daughter with haemophilia?
I think the ...
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1answer
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calculate the number of heterozygotes [closed]
The ability to taste PTC is due to a single dominant allele "T". You sampled 215 evolution students, and determined that 150 could detect the bitter taste of PTC and 65 could not. Assuming this trait ...
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2answers
444 views
Hardy Weinberg Equilibrium problem
In a small tribal population, the frequencies of two alleles A and a
at a particular locus were 0.3 and 0.7, respectively. However, not all
the individuals with genotype aa could live up to the ...
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2answers
4k views
Hardy Weinberg Equilibrium after 5 Generations
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There is a population not at HWE where red eye = $a^+$ (dominant) and white eyes = $a^-$.
If:
$a^+/a^+ = 0.6$
$a^-/a^+ = 0.1$
$a^-/a^- = 0.3$
what are the frequencies of the $a^+$ and $a^-$ ...
