STAAR Review Quizziz 4

What are the basic units of heredity?

• Cells

• Genes

• Proteins

• Chromosomes

A genotype is:

• the genetic makeup of an organism

• the physical appearance of an organism

• the environment in which an organism lives

• the diet of an organism

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A phenotype is:

• the genetic makeup of an organism.

• the observable characteristics of an organism.

• a type of cell in the body.

• a scientific theory about evolution.

A dominant gene is a gene that:

• is always expressed in the phenotype

• is never expressed in the phenotype

• only appears in recessive traits

• is only found in certain species

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NGSS.HS-LS3-1

A recessive gene is a gene that:

• is always expressed in the phenotype

• is expressed only when two copies are present

• is never expressed in the phenotype

• is expressed only in the presence of a dominant gene

What is a mutation?

• A change in the DNA sequence

• A type of cell division

• A process of protein synthesis

• A method of genetic engineering

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What are genetic disorders?

• Genetic disorders are diseases caused by abnormalities in an individual's DNA.

• Genetic disorders are a type of infectious disease.

• Genetic disorders are caused by environmental factors.

• Genetic disorders are temporary conditions that resolve on their own.

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Which type of mutation involves a change in a single base pair of DNA?

• Point mutation

• Frameshift mutation

• Insertion mutation

• Deletion mutation

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A deletion mutation is:

• a type of mutation where a part of a chromosome or a sequence of DNA is lost during DNA replication.

• a mutation that results in the addition of extra nucleotides in a DNA sequence.

• a mutation that changes a single nucleotide base pair in DNA.

• a mutation that results in the rearrangement of parts between nonhomologous chromosomes.

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NGSS.HS-LS3-2

An insertion mutation is:

• a change in a single nucleotide base pair.

• the addition of one or more nucleotide base pairs into a DNA sequence.

• the removal of one or more nucleotide base pairs from a DNA sequence.

• a change in the structure of a chromosome.

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