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AP Biology Unit 5B: Mendelian Genetics & Inheritance — practice questions — page 2

Explore 64 free Unit 5B: Mendelian Genetics & Inheritance questions in AP Biology Biology. Open each question or exercise to read its content, reference answers and available explanation.

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Unit 5B: Mendelian Genetics & Inheritance questions and exercises with answers

Showing questions 31–60 of 64.

Mendel selected how many true breeding pea plant varieties for his experiments?Read the answer and worked solution →After crossing tall and dwarf pea plants, Mendel obtained the F2 generation byRead the answer and worked solution →Mendel controlled which plants were crossed by carrying outRead the answer and worked solution →Disorders caused by absence, excess or abnormal arrangement of chromosomes are calledRead the answer and worked solution →Which of these is listed as a Mendelian disorder?Read the answer and worked solution →Match the disorder to its causeRead the answer and worked solution →Mendelian or chromosomal?Read the answer and worked solution →Judge the inheritance claimsRead the answer and worked solution →Mendel called the trait that appeared in the first generation the:Read the answer and worked solution →The offspring of Mendel's first cross were called the:Read the answer and worked solution →In Mendel's F2 generation, the ratio of violet to white flowers was about:Read the answer and worked solution →Different versions of the same gene are called:Read the answer and worked solution →An organism's underlying combination of alleles is its:Read the answer and worked solution →A cross between two true-breeding parents differing in one characteristic is called a:Read the answer and worked solution →A trait is best defined as:Read the answer and worked solution →A paired cross in which the male and female traits are swapped between the two crosses is a:Read the answer and worked solution →What percentage of Mendel's F1 hybrids had violet flowers?Read the answer and worked solution →A probability of one for an event means the event is:Read the answer and worked solution →Rolling a die and flipping a coin at the same time is the classic illustration of the:Read the answer and worked solution →A pea plant with the genotype Vv for flower colour is described as:Read the answer and worked solution →A self-cross of two Yy heterozygotes gives a phenotypic ratio of:Read the answer and worked solution →Each box of a Punnett square represents the:Read the answer and worked solution →Self-crossing Mendel's yellow-seeded F2 plants showed that the fraction breeding true was:Read the answer and worked solution →Mendel's parental pea plants always bred true because both gametes they produced:Read the answer and worked solution →The reason recessive alleles can be carried without being seen is that:Read the answer and worked solution →Working with probability laws in genetics needs large sample sizes because small samples:Read the answer and worked solution →Mendel's 1865 publication reported crosses involving how many characteristics?Read the answer and worked solution →Mendel deduced that each parent in a monohybrid cross contributes:Read the answer and worked solution →Match each genetics term to its meaningRead the answer and worked solution →Sort each genotypeRead the answer and worked solution →

Worked practice questions

Mendel selected how many true breeding pea plant varieties for his experiments?

  1. 7
  2. 21
  3. 28
  4. 14
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Correct answer: D. 14

1. A true breeding line shows the same trait consistently over generations. 2. Mendel selected 14 true breeding pea plant varieties for the work. 3. These formed seven pairs, each pair contrasting in one character. 4. The seven pairs of contrasting characters is the figure usually remembered, but the varieties number 14. _Source: syllabus Biology Ch4 'Principles of Inheritance and Variation'_

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After crossing tall and dwarf pea plants, Mendel obtained the F2 generation by

  1. self pollinating the F1 plants
  2. crossing F1 with the dwarf parent
  3. crossing F1 with the tall parent
  4. crossing two different F1 lines
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Correct answer: A. self pollinating the F1 plants

1. The first cross between tall and dwarf gave an F1 generation that was all tall. 2. To see what the F1 carried hidden, Mendel self pollinated those tall F1 plants. 3. The resulting F2 generation showed both tall and dwarf plants. 4. That reappearance of the dwarf trait is what revealed the recessive factor. 5. Crossing F1 with the recessive parent would have been a test cross, a different experiment. _Source: syllabus Biology Ch4 'Principles of Inheritance and Variation'_

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Mendel controlled which plants were crossed by carrying out

  1. natural wind pollination
  2. artificial pollination
  3. vegetative propagation
  4. random open pollination
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Correct answer: B. artificial pollination

1. Knowing the parents exactly is essential to reading an inheritance pattern. 2. Mendel conducted artificial pollination between the plants he selected. 3. That let him control which pollen reached which flower. 4. Open or wind pollination would have made the parentage unknown. _Source: syllabus Biology Ch4 'Principles of Inheritance and Variation'_

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