Dihybrid Crosses Quiz
24 Questions
12 Views

Choose a study mode

Play Quiz
Study Flashcards
Spaced Repetition
Chat to Lesson

Podcast

Play an AI-generated podcast conversation about this lesson

Questions and Answers

In a dihybrid cross, how many traits are involved simultaneously?

  • Four
  • Two (correct)
  • Three
  • One

In snapdragons, what is the phenotype of the heterozygote for flower color?

  • White
  • Pink (correct)
  • Purple
  • Red

What type of inheritance results in a heterozygote showing both traits equally?

  • Complete dominance
  • Polygenic inheritance
  • Incomplete dominance
  • Codominance (correct)

Where are X-linked traits located?

<p>On the X chromosome (D)</p> Signup and view all the answers

What is the phenotype of a roan cattle?

<p>Patchy red and white (A)</p> Signup and view all the answers

Which type of cross involves genetic crosses for two traits?

<p>Dihybrid cross (B)</p> Signup and view all the answers

In a dihybrid cross, how many different allele combinations can be produced in the offspring?

<p>4 (C)</p> Signup and view all the answers

What is the phenotype of the offspring when two white snapdragons are crossed?

<p>White (D)</p> Signup and view all the answers

What does incomplete dominance mean?

<p>The phenotype is a blend of the two alleles (B)</p> Signup and view all the answers

What is the result of a test cross?

<p>Determining the genotype of an individual with a recessive phenotype (B)</p> Signup and view all the answers

Where are Y-linked traits located?

<p>On the Y chromosome (C)</p> Signup and view all the answers

What is the result of genetic crosses involving two traits simultaneously?

<p>Dihybrid cross (D)</p> Signup and view all the answers

In X-linked recessive trait, if the mother is a carrier, what is the chance of her sons being affected?

<p>50% (A)</p> Signup and view all the answers

For an X-linked recessive trait, if the dad is affected and the mum is not a carrier, what is the chance of his daughters and sons to be affected?

<p>The daughters are carriers, who pass the traits to 50% of the grandsons (A)</p> Signup and view all the answers

In X-linked dominant trait, if the mother is the carrier of a gene, what is the chance of her sons being affected?

<p>50% (C)</p> Signup and view all the answers

For an X-linked dominant trait, if the father is the carrier of a gene, what is the chance of his sons being affected?

<p>None of his sons will be affected (B)</p> Signup and view all the answers

In ABO blood typing, which alleles are codominant to each other?

<p>IA and IB (D)</p> Signup and view all the answers

In ABO blood typing, which blood type indicates the presence of both sugars A and B?

<p>Type AB (C)</p> Signup and view all the answers

In DNA fingerprinting, what is the basis for identifying individuals?

<p>Differences in nucleotide sequences of their DNA (A)</p> Signup and view all the answers

What is the expected percentage of this couple's children to have type AB blood?

<p>50% (A)</p> Signup and view all the answers

What is the immune response when a person receives blood with an antigen that their plasma contains the antibody for?

<p>Bad response (B)</p> Signup and view all the answers

What is the chance of a mother passing an X-linked recessive trait to her daughters?

<p>50% (B)</p> Signup and view all the answers

In DNA fingerprinting, what should be found in the child's bands?

<p>All bands of the parents (C)</p> Signup and view all the answers

In ABO blood typing, which blood type is universal donor?

<p>Type O (A)</p> Signup and view all the answers

Flashcards

Dihybrid cross

A type of genetic cross where two traits are studied simultaneously.

Allele combinations

In a dihybrid cross, the offspring can inherit any combination of the alleles for both traits.

Codominance

A type of inheritance where the heterozygote expresses both alleles equally, resulting in a blended phenotype.

Incomplete dominance

A type of inheritance where the heterozygote expresses a phenotype that is intermediate between the two homozygous phenotypes.

Signup and view all the flashcards

Heterozygote

The phenotype of an individual with two different alleles for a particular trait.

Signup and view all the flashcards

Test cross

A cross between an individual with an unknown genotype and a homozygous recessive individual to determine the unknown genotype.

Signup and view all the flashcards

Gene locus

The location of a gene on a chromosome.

Signup and view all the flashcards

X-linked traits

Traits located on the X chromosome.

Signup and view all the flashcards

Y-linked traits

Traits located on the Y chromosome.

Signup and view all the flashcards

Allele combinations in dihybrid cross

In a dihybrid cross, four different allele combinations can be produced in the offspring.

Signup and view all the flashcards

Roan cattle phenotype

The phenotype of a roan cattle is a mix of red and white hairs.

Signup and view all the flashcards

Heterozygote phenotype for flower color

The phenotype of a heterozygote for flower color in snapdragons is pink.

Signup and view all the flashcards

X-linked recessive inheritance

The chance of a mother passing an X-linked recessive trait to her daughters is 50%.

Signup and view all the flashcards

X-linked recessive inheritance

The chance of a father passing an X-linked recessive trait to his sons is 0%.

Signup and view all the flashcards

X-linked recessive inheritance

If the father is affected by an X-linked recessive trait and the mother is not a carrier, the daughters will be carriers and the sons will not be affected.

Signup and view all the flashcards

X-linked dominant inheritance

The chance of a mother passing an X-linked dominant trait to her sons is 50%.

Signup and view all the flashcards

X-linked dominant inheritance

The chance of a father passing an X-linked dominant trait to his sons is 0%.

Signup and view all the flashcards

Codominance in ABO blood typing

In ABO blood typing, alleles IA and IB are codominant, meaning both are expressed equally.

Signup and view all the flashcards

Type AB blood

Type AB blood indicates the presence of both A and B sugars on the red blood cells.

Signup and view all the flashcards

DNA fingerprinting

DNA fingerprinting identifies individuals based on unique differences in their DNA sequences.

Signup and view all the flashcards

Universal donor

Type O blood is a universal donor because it lacks both A and B antigens.

Signup and view all the flashcards

Study Notes

Dihybrid Cross

  • A dihybrid cross involves two traits simultaneously.
  • In a dihybrid cross, 2^4 = 16 different allele combinations can be produced in the offspring.

Inheritance Patterns

  • Incomplete dominance results in a heterozygote showing both traits equally.
  • Codominance occurs when two alleles are equally expressed, as seen in ABO blood typing.

Flower Color in Snapdragons

  • The phenotype of the heterozygote for flower color in snapdragons is a blending of the two colors.

X-Linked Traits

  • X-linked traits are located on the X chromosome.
  • In an X-linked recessive trait, if the mother is a carrier, there is a 50% chance of her sons being affected.
  • In an X-linked recessive trait, if the dad is affected and the mum is not a carrier, all daughters will be carriers and none of the sons will be affected.
  • In an X-linked dominant trait, if the mother is the carrier of a gene, all sons will be affected.
  • In an X-linked dominant trait, if the father is the carrier of a gene, none of the sons will be affected.

ABO Blood Typing

  • ABO blood typing involves codominant alleles.
  • The presence of both sugars A and B indicates type AB blood.
  • Type O blood is the universal donor.

DNA Fingerprinting

  • DNA fingerprinting is based on identifying individuals through unique DNA patterns.
  • A child's DNA bands should contain a combination of their parents' bands.

Blood Type Inheritance

  • The expected percentage of a couple's children to have type AB blood depends on the genotypes of the parents.
  • If a person receives blood with an antigen that their plasma contains the antibody for, an immune response will occur.
  • A mother has a 50% chance of passing an X-linked recessive trait to her daughters.

Roan Cattle

  • Roan cattle have a mixture of two colors, resulting from incomplete dominance.

Studying That Suits You

Use AI to generate personalized quizzes and flashcards to suit your learning preferences.

Quiz Team

Related Documents

Description

Test your understanding of complex patterns of inheritance with this quiz on dihybrid crosses. Explore how genetic crosses involving two traits simultaneously, such as seed color and shape, demonstrate Mendel's principles of inheritance. Practice using Punnett squares to predict the outcomes of these complex genetic crosses.

More Like This

Genetic Inheritance and Phenotype
35 questions
Key Concepts in Genetics
23 questions

Key Concepts in Genetics

EvaluativeQuantum avatar
EvaluativeQuantum
Mendelian Genetics: Laws and Inheritance
10 questions
Use Quizgecko on...
Browser
Browser