Biology, asked by marrodriguezro, 2 months ago

Assume a SNV in HWE. Its heterozygous frequency and one of its homozygous frequency are the same. Answer its minor allele frequency down to two decimal places.

Answers

Answered by mufiahmotors
2

Answer:

I THE INTUITIVE APPROACH

II THE HARDY-WEINBERG EQUILIBRIUM

II-1 FOR AN AUTOSOMAL, DIALLELE, CO-DOMINANT GENE

EXERCISE

III THE HW LAW

III-1 DEMONSTRATION OF THE LAW

III-2 EXERCISES

III-3 CONSEQUENCES OF THE LAW

III-3.1 WHAT IS THE ALLELE FREQUECY IN THE n+ 1 GENERATION?

III-3.2 WHAT IS THE GENOTYPE FREQUENCY IN THE n+ 1 GENERATION?

III-3.3 EXAMPLE

IV EXTENSION OF HW TO OTHER GENE SITUATIONS

IV-1 TO AN AUTOSOMAL, TRIALLELE, CO-DOMINANT GENE

IV-2 TO AN AUTOSOMAL, DIALLELE, NON CO-DOMINANT GENE

IV-3 TO AN AUTOSOMAL, TRIALLELE, NON CO-DOMINANT GENE

IV-3.1 BERNSTEIN's EQUATION

IV-4 TO A HETEROSOMAL (= gonosomic) GENE

IV-4.1 Y CHROMOSOME

IV-4.2 X CHROMOSOME

V SUMMARY- CONSEQUENCES OF HW's LAW

*

I- THE INTUITIVE APPROACH

The Hardy-Weinberg law can be used under some circumstances to calculate genotype frequencies from allele frequences. Let A1 and A2 be two alleles at the same locus,

p is the frequency of allele A1  0 ≤ p ≤ 1

q is the frequency of allele A2  0 ≤ q ≤ 1 and p + q = 1

where the distribution of allele frequencies is the same in men and women, i.e.:

hommes (p,q)     femmes (p,q)

if they procreate :    (p + q)2 = p2 + 2pq + q2 = 1

where:

p2 = frequency of the A1 A1 genotype <-- HOMOZYGOTE

2pq = frequency of the A1 A2 genotype   <-- HETEROZYGOTE

q2 = frequency of the A2 A2 genotyp  <-- HOMOZYGOTE

these frequencies remain constant in successive generations.

 

Example : autosomal recessive inheritance with alleles A and a, and allele frequencies p and q:

--> frequency of the genotypes: : AA = p2 and the phenotypes [ ]: [A] = p2 + 2pq

Aa = 2pq  [a] = q2

aa = q2

Explanation:

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