How to find frequency of the genotypes in the next generation

[@calia2250]

Why is when I take the frequency of AA and take its square root it is different from when you add the half of heterozygous? Shouldnt it be the same?

[@mohdnafisraza7142]

Q. In a population of 100 diploid individuals, the frequency of neutral alleles A1 and A2 are 0.4 and 0.6 respectively Assuming Hardy-Weinberg equilibrium and no change in population size, the frequency of heterozygotes after five generations is a. 0.36 b. 0.32 c. 0.16 d. 0.48 How to calculate about multiple upcoming generations

[@GeneticsLessons]

Assuming that this population in H-W equilibrium frequency of the alleles and genotypes are going to be the same as in F1 generation.

[@mohdnafisraza7142]

@@GeneticsLessons sir so the upcoming proportions will be same? The mention of five generation must a mislead right?

[@mohdnafisraza7142]

@@GeneticsLessons also thank you for reply, much appreciated. You are doing a great job, your reply means a lot!!

[@GeneticsLessons]

You can check for your self - when you get F1 generation genotype and allele frequency - you can do another H-W formula calculations - and you will se why it is called H-W Equilibrium. Allelic and genotypic frequencies will change only if some genotype will have different fitness, but nothing is said about fitness in this problem.

[@mohdnafisraza7142]

@@GeneticsLessons yes sir thank you, i was just being sure. Glad you replied

[@fatinnabilah458]

greetings kind sir. may i ask, if the question is regarding 2 populations with given frequencies beforehand, how should i calculate the genotype frequencies in the next generation ? ( this next generation is randomly mated)

[@GeneticsLessons]

If population in H-W. Frequencies of genotypes are going to be stable from generation to generation.

[@fatinnabilah458]

It isn't, sir. The population is not in hwe

[@GeneticsLessons]

Then formula is different - you need to search a folder "Hardy-Weinberg problems" on my channel for solutions for this case.

[@tousifpk9496]

q =0.5 , what is the value for 2nd generation

[@GeneticsLessons]

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[@thejac4098]

DNA collected from a crime scene and from a suspect have the following genotype A1A2B2B2C1C2 .If the frequencies of A1,B1 and C1 are 0.9, 0.99 and 0.8 respectively .Calculate the probability that another person in the suspect's group has the same pattern of these alleles. a)1.44 * 10^-6 b)5.76*10^-6 c)0.400 d)0.600 plz solve this.

[@GeneticsLessons]

The correct answer b.

[@GeneticsLessons]

Will make a video later today with a solution.

[@GeneticsLessons]

Here is a solution: kzbin.info/www/bejne/pIink5qkfJx1ick

[@Guy_OFFICIAL]

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[@GeneticsLessons]

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