Stack Exchange Network

Stack Exchange network consists of 174 Q&A communities including Stack Overflow, the largest, most trusted online community for developers to learn, share their knowledge, and build their careers.

Visit Stack Exchange

Questions tagged [hardy-weinberg]

A model for allele and genotype frequencies in a non-evolving population.

-2
votes
2answers
53 views

What is difference between Incest and Inbreeding? [on hold]

Are they the same? As both are related to sexual activity between close relatives.
2
votes
1answer
27 views

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-...
1
vote
1answer
33 views

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 ...
3
votes
2answers
71 views

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 ...
2
votes
2answers
91 views

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 ...
0
votes
1answer
1k views

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 ...
0
votes
1answer
85 views

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 ...
0
votes
1answer
233 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 ...
1
vote
1answer
143 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,...
4
votes
1answer
107 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 ...
5
votes
2answers
2k views

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 ...
16
votes
2answers
8k views

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 ...
3
votes
0answers
49 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 ...
1
vote
1answer
233 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 ...
5
votes
1answer
146 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 ...
1
vote
1answer
261 views

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 ...
2
votes
2answers
174 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 ...
3
votes
2answers
348 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 ...
1
vote
0answers
1k views

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 ...
1
vote
1answer
2k views

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 ...
1
vote
3answers
261 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 ...
2
votes
1answer
916 views

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 ...
3
votes
1answer
3k views

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 ...
2
votes
1answer
936 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 ...
1
vote
4answers
8k views

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 ...
0
votes
1answer
2k views

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 ...
3
votes
2answers
411 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 ...
2
votes
2answers
4k views

Hardy Weinberg Equilibrium after 5 Generations

1 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 $a^-$ ...