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Free Practice Quiz Question List

2 Inheritance Patterns and Genetic Analysis Online Quiz Questions

Use this free practice quiz with 20 questions to review 2 Inheritance Patterns and Genetic Analysis, test your knowledge, and prepare for your next test or exam.

20 questions
01
True or false
1 point

True or false: A dominant allele is necessarily more common or more beneficial than a recessive allele.

  1. A

    True

  2. B

    False

02
Written response
1 point

An individual has genotype RrRr, with two different alleles for the gene. What term describes this individual’s genotype?

03
Written response
1 point

What is the standard term for a cross that follows the inheritance of one gene?

04
Fill in the blank
1 point

According to Mendel’s law of segregation, the two alleles for a gene separate during gamete formation, so each gamete receives .

05
Choose one
1 point

In snapdragons with incomplete dominance, red flowers crossed with white flowers produce pink heterozygotes. What phenotype ratio is expected when two pink heterozygotes are crossed?

  1. A

    1 red : 2 pink : 1 white

  2. B

    3 red : 1 white

  3. C

    All pink

  4. D

    1 red : 1 white

06
Fill in the blank
1 point

When multiple genes contribute to a trait that can show a range of phenotypes, the pattern is called .

07
True or false
1 point

True or false: A Punnett square predicts probabilities for each conception, not a guaranteed exact number of offspring with each genotype.

  1. A

    True

  2. B

    False

08
Written response
1 point

Two individuals with genotype AaBbAaBb are crossed. Assuming complete dominance and independent assortment, what is the probability that an offspring has both recessive phenotypes? Enter the probability as a decimal between 0 and 1.

09
Choose all
1 point

Select all statements that are correct about ABO blood-group inheritance.

  1. A

    In genotype IAIBI^A I^B, both alleles are expressed.

  2. B

    Allele ii is dominant to IAI^A.

  3. C

    An individual can carry all three ABO alleles because the population has three.

  4. D

    Alleles IAI^A and IBI^B are codominant, and each is dominant to ii.

10
Choose one
1 point

A plant has a dominant phenotype but an unknown genotype. It is crossed with a homozygous recessive plant, and some offspring show the recessive phenotype. What conclusion follows about the unknown parent?

  1. A

    The unknown parent must be homozygous dominant.

  2. B

    The unknown parent carried a recessive allele.

  3. C

    The unknown parent must be homozygous recessive.

  4. D

    The offspring’s phenotype does not provide information about the unknown parent.

11
Choose all
1 point

Select all statements that describe conventional pedigree symbols correctly.

  1. A

    Squares conventionally represent males.

  2. B

    Unshaded symbols conventionally represent individuals with the trait.

  3. C

    Circles conventionally represent females.

  4. D

    Shaded symbols conventionally represent individuals with the trait.

12
Choose one
1 point

An affected father has an X-linked dominant allele, and the mother is unaffected. Assuming the usual XX/XY inheritance pattern, which outcome is expected for their children?

  1. A

    All daughters inherit his X-linked allele, and none of his sons inherit it from him.

  2. B

    All sons inherit his X-linked allele, and none of his daughters inherit it.

  3. C

    Half of his daughters inherit his X-linked allele, and half of his sons inherit it.

  4. D

    All his children inherit his X-linked allele.

13
Open ended
1 point

Explain why a pedigree can help infer an inheritance pattern without always proving a single explanation. Give at least two factors that could obscure the pattern.

14
Choose one
1 point

In snapdragons, flower color shows incomplete dominance. If a red-flowered plant is crossed with a white-flowered plant, what flower color is expected in a heterozygous offspring?

  1. A

    Red flowers

  2. B

    Pink flowers

  3. C

    White flowers

  4. D

    A mixture of separate red and white flowers

15
Choose one
1 point

An individual with genotype AaAa forms gametes. Which gamete types are expected, and in what proportions?

  1. A

    Only AA

  2. B

    AA and aa, in equal proportions

  3. C

    AAAA and aaaa, in equal proportions

  4. D

    Only aa

16
Written response
1 point

An individual with a dominant phenotype and unknown genotype is crossed with a homozygous recessive individual. The cross produces an offspring with the recessive phenotype. What genotype category must the unknown parent have?

17
Choose one
1 point

A person has genotype IAIBI^AI^B for the ABO blood group. What blood type results?

  1. A

    Type A

  2. B

    Type B

  3. C

    Type AB

  4. D

    Type O

18
Choose one
1 point

A trait is influenced by several genes and shows a broad range of phenotypes rather than a few distinct categories. Which inheritance pattern best describes it?

  1. A

    Complete dominance

  2. B

    Codominance

  3. C

    Polygenic inheritance

  4. D

    Law of segregation

19
Choose one
1 point

A fully penetrant trait appears in an affected daughter whose parents are both unaffected, and affected individuals occur in both sexes in the family. Assuming no new variants, which standard inheritance pattern best fits this pedigree?

  1. A

    Autosomal recessive

  2. B

    X-linked recessive

  3. C

    Autosomal dominant

  4. D

    X-linked dominant

20
True or false
1 point

A gene has five known alleles in a population. A diploid individual can carry all five of those alleles at that gene. True or false?

  1. A

    True

  2. B

    False