Unit 5 Progress Check: MCQ – AP Biology Study Guide

Unit 5 Progress Check: MCQ - AP Biology Study Guide

Unit 5 Progress Check for AP Biology focuses on key concepts in genetics and cellular processes. This study guide includes multiple-choice questions that cover topics such as meiosis, inheritance patterns, and chi-square analysis. Designed for AP Biology students preparing for the exam, it provides a comprehensive review of essential material. The guide features questions related to phenotypic ratios, genetic crosses, and the role of meiosis in genetic diversity.

Key Points

  • Includes multiple-choice questions on genetics and cellular processes for AP Biology students.
  • Covers topics such as meiosis, inheritance patterns, and chi-square analysis.
  • Designed to help students prepare for the AP Biology exam with practice questions.
  • Features questions on phenotypic ratios and genetic crosses relevant to AP Biology curriculum.
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R. C. Punnett conducted experiments on the inheritance of traits in the sweet pea, Lathyrus odoratus. In one experiment,
he crossed two different true-breeding sweet pea plant strains, one with erect petals and long pollen, and the other with
hooded petals and round pollen. All the offspring ( generation) had erect petals and long pollen (Figure 1).
Figure 1. Sweet pea plant cross
Next, Punnett allowed the generation to self-fertilize and recorded the phenotypes of their offspring. The data are
shown in Table 1.
Table 1.
results of self-fertilization cross
Phenotype of Number of Offspring
Erect petals, long pollen 765
Erect petals, round pollen 62
Hooded petals, long pollen 71
Hooded petals, round pollen 220
Total 1,118
1.
Sweet pea plants have a diploid
chromosome number of 14.
Which of the following best explains how the sweet pea plants in the parental generation produce
offspring with
14 chromosomes?
AP BIOLOGY Scoring Guide
Unit 5 Progress Check: MCQ
AP Biology
Page 1 of 17
(A)
Meiosis and lead to the formation of cells with 14 chromosomes. When two cells combine during
fertilization, extra chromosomes are randomly broken down, leading to offspring with 14 chromosomes.
(B)
Meiosis and lead to the formation of cells with 14 chromosomes. When two cells combine during
fertilization, extra chromosomes with recessive traits are broken down, leading to offspring with 14
chromosomes.
(C)
Meiosis and lead to the formation of cells with 7 chromosomes. During meiosis , homologous
chromosomes separate. During meiosis , sister chromatids separate. Two cells combine during
fertilization to produce offspring with 14 chromosomes.
(D)
Meiosis and lead to the formation of cells with 7 chromosomes. During meiosis , sister chromatids
separate. During meiosis , homologous chromosomes separate. Two cells combine during fertilization
to produce offspring with 14 chromosomes.
2.
Which of the following questions would be most useful to researchers trying to determine the role of meiosis in the
phenotypic frequencies?
(A) What is the molecular mechanism underlying the dominance of erect petals and long pollen?
(B)
Which phenotypes give pea plants the highest level of fitness: erect or hooded petals and long or round
pollen?
(C) How do the phases of meiosis differ between sweet pea plants and other organisms?
(D) What is the recombination frequency between the genes for petal shape and pollen shape?
3.
How many degrees of freedom should be used when looking up the critical value for a chi-square analysis of the
ratios of phenotypes observed among the offspring versus the expected phenotypic ratio assuming independent
assortment?
(A) 2
(B) 3
(C) 4
(D) 5
4.
For sexually reproducing diploid parent cells, which of the following statements best explains the production of
haploid cells that occurs in meiosis but not in mitosis?
(A) Separation of chromatids occurs once, and there is one round of cell division in meiosis.
(B) Separation of chromatids occurs twice, and there are two rounds of cell division in mitosis.
(C) Separation of chromatids occurs once, and there are two rounds of cell division in meiosis.
(D) Separation of chromatids occurs twice, and there is one round of cell division in mitosis.
5. Which of the following best explains a distinction between metaphase
and metaphase ?
(A) The nuclear membrane breaks down during metaphase
but not during metaphase .
(B) Chromosomes align at the equator of the cell during metaphase but not during metaphase .
(C) The meiotic spindle is needed during metaphase
but not during metaphase .
(D)
Homologous pairs of chromosomes are aligned during metaphase , but individual chromosomes are
aligned during metaphase .
Scoring Guide
Unit 5 Progress Check: MCQ
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AP Biology
6.
In anaphase of meiosis, cohesion between the centromeres of sister chromatids is maintained while homologous
chromosomes migrate to opposite poles of the cell along the meiotic spindle as represented in Figure 1.
Figure 1. Migration of homologous chromosomes during anaphase of meiosis
A compound that prevents the separation of the homologous chromosomes in anaphase
is being studied. Which of
the following questions can be best answered during this study?
(A)
Will the cells produced at the end of meiosis still be genetically identical to each other in the presence of
this compound?
(B) Will the long-term development of the individual be affected by this meiotic error?
(C) When do the centrosomes start to move apart during meiosis
as compared to meiosis ?
(D) Is there a pattern to the movement of homologous chromosomes in the presence of this compound?
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Unit 5 Progress Check: MCQ
AP Biology
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FAQs of Unit 5 Progress Check: MCQ – AP Biology Study Guide

What topics are covered in the Unit 5 Progress Check for AP Biology?
The Unit 5 Progress Check for AP Biology covers essential topics in genetics, including the principles of inheritance, the role of meiosis in genetic variation, and the application of chi-square analysis in evaluating genetic crosses. Students will encounter multiple-choice questions that test their understanding of these concepts, helping them prepare for the AP exam. Key areas include phenotypic ratios, the significance of dominant and recessive traits, and the mechanisms of genetic recombination.
How does meiosis contribute to genetic diversity?
Meiosis contributes to genetic diversity through processes such as independent assortment and crossing over. During meiosis, homologous chromosomes separate, leading to the formation of gametes with unique combinations of alleles. This genetic variation is crucial for evolution and adaptation in populations. The study guide emphasizes the importance of these mechanisms in understanding inheritance patterns and their implications for traits observed in offspring.
What is the significance of chi-square analysis in genetics?
Chi-square analysis is a statistical method used to determine if observed genetic ratios match expected ratios based on Mendelian inheritance. In genetics, it helps researchers evaluate whether deviations from expected ratios are due to chance or indicate a significant genetic influence. The Unit 5 Progress Check includes questions that require students to apply chi-square analysis to real data, reinforcing their understanding of how to interpret genetic results.
What types of inheritance patterns are explored in this study guide?
The study guide explores various inheritance patterns, including autosomal dominant, autosomal recessive, and X-linked traits. Students will learn how to identify these patterns through genetic crosses and analyze the resulting phenotypic ratios. Understanding these inheritance patterns is essential for predicting the likelihood of traits appearing in offspring, which is a key component of the AP Biology curriculum.

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