{"id":"act_practice_pdf:pt2:science:037","source_id":"act_practice_pdf","source_item_id":"pt2-science-037","external_id":null,"program":"ACT","section":"science","category_code":"EMI","category":"Evaluation of Models, Inferences & Experimental Results","subcategory_code":null,"subcategory":null,"form_id":"act_practice_pdf:pt2","passage_id":"act_practice_pdf:pt2:science:p7","position":37,"scored":true,"layout_warning":null,"stem":"Suppose that another population of amoebas with an initial Allele A frequency of 0.5 and an initial size of 10,000 had been included in the computer simulation. Based on Figure 1, the frequency of Allele B in G2 for that population would most likely have been closest to which of the following?","stimulus":"","stimulus_html":null,"stem_html":"<p>Suppose that another population of amoebas with an initial Allele A frequency of 0.5 and an initial size of 10,000 had been included in the computer simulation. Based on Figure 1, the frequency of Allele B in G2 for that population would most likely have been closest to which of the following?</p>","rationale_html":null,"correct_answer":["B"],"equiv_key":"d25b5089e2da015283184a7b","has_media":false,"has_mathml":false,"has_table":false,"section_label":"Science","options":[{"label":"A","content_html":"<p>0.0</p>","ord":0},{"label":"B","content_html":"<p>0.5</p>","ord":1},{"label":"C","content_html":"<p>0.8</p>","ord":2},{"label":"D","content_html":"<p>1.0</p>","ord":3}],"passage":{"id":"act_practice_pdf:pt2:science:p7","source_id":"act_practice_pdf","form_id":"act_practice_pdf:pt2","section":"science","number":"VII","kind":null,"title":null,"content_html":"<p>A computer simulation was run to study genetic drift (random fluctuations in allele frequencies) over several generations of 8 populations (P1−P8) of amoebas that reproduce asexually. Each amoeba in the initial generation (G0) of each population was homozygous for 1 of the alleles, Allele A or Allele B, of a specific gene. Each of 6 subsequent generations (G1−G6) was produced by randomly choosing half of the amoebas from the previous generation to reproduce. Figure 1 shows the frequency of Allele A in G0−G6 for each of P1−P4; Figure 2 shows the same for each of P5−P8. There were 10,000 amoebas in G0 of each of P1−P4; there were 12 amoebas in G0 of each of P5−P8. Figure 1 Key P1 P2 P3 P4 1.0 0.9 0.8 A 0.7 e l e ll 0.6 A f o 0.5 y c n e 0.4 uq e 0.3 rf 0.2 0.1 0.0 0 1 2 3 4 5 6 G Figure 2 Key P5 P6 P7 P8 1.0 0.9 0.8 A 0.7 e l e ll 0.6 A f o 0.5 y c n e 0.4 uq e rf 0.3 0.2 0.1 0.0 0 1 2 3 4 5 6 G Figures adapted from Teresa Audesirk et al., Biology: Life on Earth, 6th ed. ©2002 by Prentice-Hall, Inc.</p>","ord":7},"attribution":{"source_id":"act_practice_pdf","source_name":"Official ACT full-length practice tests (PDF)","rights_holder":"ACT Education Corp.","canonical_url":"https://www.act.org/content/act/en/products-and-services/the-act/test-preparation.html","retrieved_from":"https://www.act.org/content/act/en/products-and-services/the-act/test-preparation.html","attribution":"Full-length ACT practice tests © ACT Education Corp., published free at act.org. Questions are retired items from previous ACT administrations.","disclaimer":"Extracted from a print-layout PDF: equations, figures and charts do not survive as text. Use the original PDF for anything that renders poorly. ACT® is a registered trademark of ACT Education Corp., which is not affiliated with, does not sponsor, and does not endorse this project.","license":"ACT Education Corp. copyright. Published free for personal test preparation; not licensed for redistribution.","redistributable":false,"item_count":342},"equivalents":[]}