Genetics Quiz

What is a Test Cross?

• A method to determine the phenotype of an organism

• A technique to identify dominant alleles

• A test to determine the genotype of an individual with a dominant phenotype

• A process to create genetic mutations

According to Darwin, what is the force behind the diversity of species on Earth?

• Genetic drift

• Natural selection

• Artificial selection

• Mutation

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What does DNA availability affect in gene expression?

• Protein synthesis

• Transcription

• RNA splicing

• Translation

What is epistasis?

• One gene affects multiple traits.

• Multiple genes contribute to one phenotype.

• One gene affects the expression of another.

• Genes close on the same chromosome are inherited together.

What is the main use of polymerase chain reaction (PCR)?

• Detecting pathogens

• Amplifying a specific DNA sequence

• Identifying genetic mutations

• Studying gene expression

What is a mutation?

• A planned change in a cell's DNA sequence

• A random change in a cell's DNA sequence

• A change in a cell's RNA sequence

• A change in a cell's protein structure

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What is the role of the genetic code table in protein synthesis?

• To transcribe DNA to mRNA

• To match codons with amino acids

• To degrade proteins

• To replicate DNA

What is the significance of mutations in evolution?

• They prevent genetic variation

• They are harmful and should be avoided

• They are the source of genetic variation

• They have no effect on evolution

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What does the semiconservative model of DNA replication show?

• DNA is replicated in a conservative manner

• Each new DNA molecule has two new strands

• Each new DNA molecule has one original and one new strand

• DNA replication occurs in the cytoplasm

In the equation p² + 2pq + q², what does p² represent?

• Heterozygous frequency

• Homozygous recessive frequency

• Homozygous dominant frequency

• Allele frequency