Advanced Biology Quiz for Seniors

What are alleles?

• Identical copies of a gene

• Different versions of the same gene

• A mutation in a gene

• A protein-coding region of DNA

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Why do cells regulate their gene expression?

• To avoid mutations

• To conserve energy and resources

• To maintain their shape

• To produce only structural proteins

What is the purpose of a test cross?

• To determine the phenotype of offspring

• To determine the genotype of an organism with a dominant phenotype

• To identify recessive traits in a population

• To test the viability of gametes

The genetic code is considered redundant because:

• Each codon codes for multiple amino acids

• Multiple codons can code for the same amino acid

• It allows DNA to replicate accurately

• It contains introns and exons

In evolutionary terms, fitness refers to:

• Physical strength and size

• The ability to survive and reproduce

• An organism’s lifespan

• Genetic mutation rates

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According to Darwin, the force behind the diversity of life on Earth is:

• Artificial selection

• Natural selection

• Genetic drift

• Mutation

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If a DNA strand has the sequence AGC, the complementary RNA codon will be:

• AGC

• UCG

• TCG

• GCU

A gene can best be defined as:

• A sequence of DNA that codes for a protein

• A regulatory region of DNA

• A mutation in the genome

• A part of the chromosome that stores energy

What type of inheritance is indicated by a bell-shaped curve?

• Codominance

• Polygenic inheritance

• Epistasis

• Linked genes

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The anticodon for an mRNA codon UAC is:

• AUG

• UAC

• GUA

• ATG