What does the ratio 3:1 mean?

It means 3 parts of one quantity to 1 part of another quantity.

It means 3 parts of one quantity to 3 parts of another quantity.

It means 1 part of one quantity to 3 parts of another quantity.

It means 3 parts of one quantity to 2 parts of another quantity.

Key Concept Check: How can inheritance be modeled?

By utilizing variables and constants

How does polygenic inheritance differ from Mendel’s model?

Polygenic inheritance involves multiple genes affecting a trait, while Mendel’s model involves single gene pairs.

Polygenic inheritance follows the law of segregation, while Mendel’s model does not.

Polygenic inheritance is based on dominant and recessive alleles, while Mendel’s model is not.

Polygenic inheritance results in discrete traits, while Mendel’s model results in continuous variation.

Review the terms and their definitions in the Mini Glossary. Compare and contrast genotype and phenotype.

Genotype refers to the genetic makeup, while phenotype is the observable characteristics.

Genotype is the observable characteristics, while phenotype refers to the genetic makeup.

Both genotype and phenotype refer to the observable characteristics.

Both genotype and phenotype refer to the genetic makeup.

Predict three facts that will be discussed in Lesson 2 after reading the headings. Which of the following is a likely fact to be recorded in your Science Journal?

The lesson will explain the process of photosynthesis.

The lesson will cover the water cycle.

The lesson will discuss the structure of atoms.

The lesson will describe the layers of the Earth.

Which of the following is a fact about chromosomes?

Chromosomes are structures within cells that contain DNA.

Chromosomes are only found in plant cells.

Chromosomes are responsible for protein synthesis.

Chromosomes are made up of lipids.

What is the definition of gene and alleles?

Gene is a segment of DNA that codes for a protein, and alleles are different forms of a gene.

Gene is a type of cell, and alleles are the proteins produced by the gene.

Gene is a type of chromosome, and alleles are the different chromosomes.

Gene is a type of RNA, and alleles are the different types of RNA.

Distinguish genotype and phenotype.

Genotype refers to the genetic makeup, while phenotype refers to the observable characteristics.

Genotype refers to observable characteristics, while phenotype refers to the genetic makeup.

Genotype and phenotype both refer to observable characteristics.

Genotype and phenotype both refer to genetic makeup.

How are symbols used to represent alleles in a genotype?

Symbols are used to denote different alleles, with uppercase letters representing dominant alleles and lowercase letters representing recessive alleles.

Symbols are used to represent the physical traits of an organism.

Symbols are used to indicate the number of chromosomes in a cell.

Symbols are used to describe the evolutionary history of a species.

Identify the 2 models used to identify and predict traits among genetically related individuals.

Pedigree Analysis and Linkage Analysis

Genome-Wide Association Studies and Twin Studies

Quantitative Trait Loci Mapping and Heritability Analysis

Genomic Selection and Genetic Drift

A Punnett square is used to:

Predict the outcome of a genetic cross

Calculate the speed of a moving vehicle

Determine the chemical composition of a substance

Which trait is dominant if two parents with curly hair have children, some of whom have curly hair and some have straight hair?

Both traits are equally dominant

Which of the following best explains the idea of multiple alleles?

Multiple alleles refer to the presence of more than two alleles for a genetic trait within a population.

Multiple alleles are when two alleles are present for a trait in an individual.

Multiple alleles mean that a single allele controls multiple traits.

Multiple alleles are when alleles are located on different chromosomes.

Which of the following best describes the difference between Mendel’s interpretation of inheritance and polygenic inheritance?

Mendel’s interpretation involves single-gene traits, while polygenic inheritance involves multiple genes affecting a trait.

Mendel’s interpretation involves multiple genes, while polygenic inheritance involves single-gene traits.

Mendel’s interpretation and polygenic inheritance both involve single-gene traits.

Mendel’s interpretation and polygenic inheritance both involve multiple genes affecting a trait.

Connect It: Eye color is a trait determined by polygenic inheritance. Would using a pedigree chart work to trace this trait in a family?

No, because pedigree charts are not suitable for polygenic traits.

Yes, because pedigree charts can trace polygenic traits effectively.

Yes, but only if the family has a history of eye color variation.

No, because eye color is not influenced by inheritance.

Understanding Inheritance Chapter Quiz

Authored by Kwinsi Bridges

Science

8th Grade

NGSS covered

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38 questions

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MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What determines the expression of traits?

Genetic makeup

Environmental factors

Both genetic makeup and environmental factors

Random chance

Tags

NGSS.HS-LS3-1

NGSS.HS-LS3-2

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

How can inheritance be modeled?

Using classes and objects

Through functions and procedures

By utilizing arrays and lists

With the help of variables and constants

Tags

NGSS.MS-LS3-2

NGSS.MS-LS3-1

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

How do some patterns of inheritance differ from Mendel’s model?

They involve multiple alleles.

They follow Mendel's laws strictly.

They do not involve any genetic variation.

They are based on a single trait.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

How many alleles controlled flower color in Mendel’s experiments?

One

Two

Three

Four

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

In a pea plant, an allele for a tall stem is dominant to an allele for a short stem. You see a pea plant with a short stem. What can you conclude about the genotype of this plant?

The plant is homozygous dominant.

The plant is heterozygous.

The plant is homozygous recessive.

The plant has a mutation.

Tags

NGSS.HS-LS3-1

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Alleles determine the expression of traits by:

coding for different proteins that affect traits

being identical in all individuals

not affecting the phenotype

only being present in animals

Tags

NGSS.HS-LS3-1

NGSS.HS-LS1-1

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Identify the genotype of a plant that produces a wrinkled pea.

Homozygous recessive (rr)

Homozygous dominant (RR)

Heterozygous (Rr)

Homozygous dominant (YY)

Tags

NGSS.HS-LS3-1

NGSS.HS-LS3-2

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Understanding Inheritance Chapter Quiz

What determines the expression of traits?

How can inheritance be modeled?

How do some patterns of inheritance differ from Mendel’s model?

How many alleles controlled flower color in Mendel’s experiments?

In a pea plant, an allele for a tall stem is dominant to an allele for a short stem. You see a pea plant with a short stem. What can you conclude about the genotype of this plant?

Alleles determine the expression of traits by:

Identify the genotype of a plant that produces a wrinkled pea.

What phenotypes are possible for pea offspring of this cross?

If the cross shown in the figure produced 100 offspring, about how many offspring would have green peas?

What does the ratio 3:1 mean?

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