Dihybrid Cross Quiz
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Questions and Answers

What is a dihybrid cross?

  • A cross between two genetically identical individuals
  • A cross between two individuals with the same genotype
  • A cross between two entities of two different traits (correct)
  • A cross between two individuals showing only one trait

What were the phenotypes of the F1 generation resulting from crossing round-yellow seed (RRYY) with wrinkled-green seed (rryy)?

  • All wrinkled yellow seeds (rryy)
  • All round green seeds (RrYy)
  • All round yellow seeds (RrYy) (correct)
  • All wrinkled green seeds (rryy)

Which of Mendel's laws is based on a monohybrid cross?

  • The law of independent assortment
  • The law of dominance
  • The law of segregation (correct)
  • The law of codominance

What does the law of segregation state?

<p>Each gamete receives only one allele for a trait (D)</p> Signup and view all the answers

Which process involves the random separation of homologous chromosomes during cell division?

<p><strong>Meiosis</strong> (C)</p> Signup and view all the answers

How many foundational laws of inheritance did Mendel discover?

<p><strong>Two</strong> (B)</p> Signup and view all the answers

What does the Law of Independent Assortment state?

<p><strong>Genes on different chromosomes sort independently</strong> (A)</p> Signup and view all the answers

If a dihybrid cross involves individuals with genotypes RrYy, what are the possible gametes produced by each parent?

<p><strong>RY, Ry, rY, ry</strong> (A)</p> Signup and view all the answers

During which stage of cell division do genes segregate into daughter cells?

<p><strong>Anaphase</strong> (A)</p> Signup and view all the answers

'Round-yellow, wrinkled-yellow, wrinkled-green, and round-green' are examples of which genetic concept?

<p><strong>Dihybrid inheritance</strong> (A)</p> Signup and view all the answers

Match the following terms with their descriptions:

<p>Dihybrid cross = Cross between two entities of two different traits Law of segregation = States that alleles for a trait are randomly passed to offspring Law of independent assortment = States that genes do not influence each other in allele sorting F1 generation = Result of crossing round-yellow seed with wrinkled-green seed</p> Signup and view all the answers

Match the following genotypes with their corresponding phenotypes:

<p>RRYY = Round yellow seeds rryy = Wrinkled green seeds RrYy = Round yellow seeds RrYy x RrYy = Round-yellow, wrinkled-yellow, wrinkled-green, round-green seeds</p> Signup and view all the answers

Match the following statements with the correct law of inheritance:

<p>Genes segregate into daughter cells during cell division = Law of segregation Genes do not influence each other in allele sorting = Law of independent assortment Alleles randomly separate during meiosis = Law of segregation Traits are independently inherited = Law of independent assortment</p> Signup and view all the answers

Match the following stages with their corresponding genetic process:

<p>Meiosis = Homologous chromosomes segregate into daughter cells Dihybrid cross = Crossing between two traits at a time Monohybrid cross = Crossing involving a single trait F1 generation = Resulting from crossing two different entities</p> Signup and view all the answers

Match the following terms with their definitions:

<p>Dihybrid Cross = Cross between two traits of individuals at a time Law of Segregation = Random separation of alleles during meiosis Law of Independent Assortment = Genes for separate traits passed independently from parents Metaphase I of Meiosis = Stage where pairs of chromosomes align randomly at the center</p> Signup and view all the answers

Match the following genetic concepts with their descriptions:

<p>Round-yellow, wrinkled-green, etc. = Phenotypes resulting from dihybrid cross Alleles for a trait passed randomly to offspring = Explanation of Law of Segregation Genes do not influence each other in sorting alleles = Definition of Law of Independent Assortment Separate genes for separate traits passed independently = Implication of Law of Independent Assortment</p> Signup and view all the answers

Match the following stages of cell division with their characteristics:

<p>Meiosis Metaphase I = Pairs of chromosomes align randomly at the center Random segregation of homologous chromosomes = Description of Law of Segregation Separation of alleles into gametes = Process during Law of Independent Assortment Passing different gene versions to daughter cells = Explanation of genetic inheritance</p> Signup and view all the answers

Match the following statements with the correct Mendel's law they describe:

<p>Copies of genes randomly separate during meiosis = Law of Segregation Every possible combination of alleles equally likely = Law of Independent Assortment Separate genes for separate traits passed independently = Both Laws combined Occurs in metaphase I when chromosomes align randomly = Characteristic stage for both Laws</p> Signup and view all the answers

Flashcards

Dihybrid Cross

A cross between two parents that differ in two pairs of contrasting traits.

F1 Generation Phenotype

The offspring produced from a dihybrid cross are all round and yellow.

Mendel's Law of Segregation

The concept that each pair of alleles separates from each other during gamete formation, resulting in each gamete receiving only one allele.

Mendel's Law of Independent Assortment

The concept that alleles of different genes are sorted independently of one another during gamete formation.

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Meiosis

The process that involves the random separation of homologous chromosomes during cell division.

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Anaphase

The stage of cell division where genes segregate into daughter cells.

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Genotype

The genetic makeup of an individual.

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Phenotype

The physical expression of an individual's genotype.

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Monohybrid Cross

A cross between two parents that differ in one pair of contrasting traits.

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Gamete Formation

The possible gametes produced from an individual with the genotype RrYy are RY, Ry, rY, and ry.

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Dihybrid Cross

A cross between parents with different alleles for two traits, resulting in offspring with varying combinations of those traits.

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F1 Generation Phenotype

The offspring resulting from a dihybrid cross will display a unique combination of traits based on the dominant alleles.

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Mendel's Law of Segregation

The principle that explains the separation of alleles during gamete formation, resulting in each gamete receiving only one allele.

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Mendel's Law of Independent Assortment

The principle that explains the independent assortment of alleles from different genes during gamete formation.

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Meiosis

The process that involves the separation of homologous chromosomes, leading to the production of gametes with unique combinations of alleles.

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Anaphase

The stage of cell division where chromosomes are pulled apart, leading to the segregation of genes into daughter cells.

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Genotype

The genetic code of an individual, encompassing the combination of alleles inherited from their parents.

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Phenotype

The observable physical characteristics of an individual, resulting from the interaction of their genotype and the environment.

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Study Notes

Dihybrid Cross

  • A dihybrid cross is a cross between two parents that differ in two pairs of contrasting traits.

F1 Generation Phenotypes

  • The phenotypes of the F1 generation resulting from crossing round-yellow seed (RRYY) with wrinkled-green seed (rryy) are all round and yellow.

Mendel's Laws

  • Mendel's Law of Segregation is based on a monohybrid cross.
  • The Law of Segregation states that each pair of alleles separates from each other during gamete formation, resulting in each gamete receiving only one allele.
  • The Law of Independent Assortment states that alleles of different genes are sorted independently of one another during gamete formation.

Cell Division

  • Meiosis is the process that involves the random separation of homologous chromosomes during cell division.
  • Genes segregate into daughter cells during the anaphase stage of cell division.

Foundational Laws of Inheritance

  • Mendel discovered three foundational laws of inheritance: the Law of Segregation, the Law of Independent Assortment, and the Law of Dominance.

Gamete Formation

  • If a dihybrid cross involves individuals with genotypes RrYy, the possible gametes produced by each parent are RY, Ry, rY, and ry.

Genetic Concepts

  • 'Round-yellow, wrinkled-yellow, wrinkled-green, and round-green' are examples of the concept of multiple alleles.

Matching Terms and Descriptions

  • Match the following terms with their descriptions:
    • Monohybrid cross: a cross between two parents that differ in one pair of contrasting traits.
    • Dihybrid cross: a cross between two parents that differ in two pairs of contrasting traits.
    • Genotype: the genetic makeup of an individual.
    • Phenotype: the physical expression of an individual's genotype.

Matching Genotypes and Phenotypes

  • Match the following genotypes with their corresponding phenotypes:
    • RrYy: round and yellow
    • rrYy: wrinkled and yellow
    • RrYY: round and yellow
    • rrYY: wrinkled and yellow

Matching Laws of Inheritance

  • Match the following statements with the correct law of inheritance:
    • Each pair of alleles separates from each other during gamete formation: Law of Segregation.
    • Alleles of different genes are sorted independently of one another during gamete formation: Law of Independent Assortment.
    • One allele can be dominant over another allele: Law of Dominance.

Matching Stages of Cell Division

  • Match the following stages of cell division with their characteristics:
    • Meiosis: involves the random separation of homologous chromosomes during cell division.
    • Anaphase: genes segregate into daughter cells during this stage.
    • Gamete formation: involves the production of gametes with unique combinations of alleles.

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Description

Test your understanding of dihybrid crosses by exploring the inheritance patterns of two different traits in genetic crosses. Learn about how traits are passed on from parent to offspring through multiple generations.

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