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# Model experiment 1. Study of the genetic structure of the ideal population (second option)

• In column 2 for the parent generation P, we introduce the number of pairs of two-body gene alleles (in other words, the number of individuals).
• We determine the ratio of the dominant (A) and recessive (a) alleles and select the required number of chips.
• We put the selected number of chips in an opaque package, mix.
• We get 2 chips and put it into one of three packs: in the first one - a pair of one color, red (AA), in the other - a pair of different colors, red and white (Aa), in the third - a pair of the second color, white (aa).
• We count the number of pairs of chips in each pile.
• The results are entered in the row P: in column 3 - the number of AA, in column 5 - Aa, in column 7 - aa.
• Click the "Calculate" button.
• We collect the chips for the package, mix, repeat steps 6 and 7 successively two more times, filling the lines for the first (F1) and the second (F2) daughter generations, columns 3, 5, 7.
• We click the "Calculate" button opposite the lines F1 and F2, the line "Total" and "Average."
• Click on the "Show Graphs" button.
• Based on the analysis of the obtained graphs and diagrams, formulate the conclusions of the plan:
• Change in the frequency of genotypes in generations;
• Change in the ratio of gene frequencies in generations;
• The direction of evolutionary changes in the population.

# Table 2. Genetic structure of the ideal population

 Generation Number of individuals Distribution of genotypes Gene frequencies АА Аа аа А(p) a(q) 1 2 3 4 5 6 7 8 9 10 Р Calculate F1 Calculate F2 Calculate Total Calculate Average Calculate
Note: Gene frequencies are calculated automatically by the formulas: p = (D + 0.5H) / N and q = (R + 0.5H) / N, where p is the frequency of the dominant allele, q is the frequency of the recession allele, D is the number of dominant homozygote, R is the number of recessive homozygotes, H is the number of heterozygotes, N is the total number of members of the population.
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