Download Hardy - Weinberg Equilibrium

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Hardy - Weinberg Equilibrium Classwork
Gene frequencies in the gene pool remain relatively constant from
generation to generation (i.e. genetic equilibrium is established) as long as
5 conditions prevail:
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ALLELE frequency in population
Given "p" representing dominant allele and "q" representing
recessive allele, total alleles in whole population is given by the equation:
GENOTYPE frequency in population
Three genotypes possible:
Frequency for each genotype:
Equation:
EX #1: A plant population consists of 84% plants with red flowers and 16 %
with white flowers. Assuming the red allele (R) is dominant and the white
allele (r) is recessive, find the frequency of the red flower allele.
#1 convert percentages to decimals:
#2 find "q"
#3 find "p"
EX #2 In the above example, fine the frequency of homozygous dominant
and heterozygous individuals in percentages.
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EX#3: Calculate the frequency of the genotype for red-eyed, heterozygous
fruit flies if 9% of the fruit flies are green-eyed and red - eye is dominant
over green eyes.
now calculate heterozygous geneotype:
Ex #4: In a study performed in Sweden, it was found that 16% of the
population has type N blood. The N blood type results from a homozygous
condition. What is the gene frequency for the N allele in the gene pool?
Ex. #5: A recessive trait appears in 81% of the individuals in a population
that is in Hardy-Weinberg equilibrium. What percent of the population in
the next generation is expected to be homozygous dominant?