Genetics Objective Test Quiz Form
Answer the following questions to the best of your knowledge. This objective test covers key concepts in genetics.
1. Which of the following is the basic unit of heredity?
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Gene
Chromosome
Protein
Ribosome
2. What is the shape of DNA in most living organisms?
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Double helix
Linear strand
Triple helix
Circular sheet
3. Which scientist is credited with discovering the laws of inheritance?
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Gregor Mendel
James Watson
Rosalind Franklin
Barbara McClintock
4. Select all types of RNA involved in protein synthesis.
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mRNA
tRNA
rRNA
snRNA
5. What term describes a pair of alleles that are the same?
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Homozygous
Heterozygous
Dominant
Recessive
6. Briefly define 'mutation' in genetics.
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7. Match the genetic term to its correct description.
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Rows
Definition
Phenotype
Physical appearance
Genetic makeup
Alternate forms of a gene
Location of a gene
Genotype
Physical appearance
Genetic makeup
Alternate forms of a gene
Location of a gene
Allele
Physical appearance
Genetic makeup
Alternate forms of a gene
Location of a gene
Locus
Physical appearance
Genetic makeup
Alternate forms of a gene
Location of a gene
8. Which of the following is NOT a mode of inheritance?
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Autosomal dominant
Mitochondrial
Codominance
Translational
9. Short answer: What is the function of ribosomes in cells?
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10. Which of the following statements about Mendelian inheritance is TRUE?
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Each parent contributes one allele for each gene
Traits are only influenced by environmental factors
All genes are located on sex chromosomes
Dominant alleles are always more common in a population
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