Genetics Quiz

What is the probability of producing a heterozygous offspring when crossing two heterozygous pea plants for a single trait (Tt x Tt)?

• 25%

• 50%

• 75%

• 100%

In Mendelian genetics, what term is used to describe the physical appearance of an organism?

• Genotype

• Phenotype

• Allele

• Homozygous

Which of the following is NOT a level of biological classification?

• Kingdom

• Species

• Biomass

• Genus

In a Punnett Square, what does a capital letter represent?

• A recessive allele

• A dominant allele

• A genotype

• A phenotype

What is the main source of genetic variation within a population?

• Mutation

• Cloning

• Selective breeding

• Genetic drift

Which of the following best describes a phylogenetic tree?

• A diagram showing the evolutionary relationships among various biological species based on similarities and differences in their physical or genetic characteristics.

• A chart used to predict the outcome of genetic crosses.

• A list of species within a particular geographic area.

• A record of the number of individuals in a population over time.

What is the expected genotype ratio from a monohybrid cross between two heterozygous individuals (Tt x Tt)?

• 1:2:1

• 3:1

• 9:3:3:1

• 2:1:1

In the Linnaean system of classification, which is the correct order of taxonomic ranks from the most inclusive to the least inclusive?

• Kingdom, Phylum, Class, Order, Family, Genus, Species

• Species, Genus, Family, Order, Class, Phylum, Kingdom

• Order, Family, Genus, Species, Class, Phylum, Kingdom

• Phylum, Kingdom, Class, Order, Family, Genus, Species

Which of the following genetic crosses would produce offspring with a 3:1 phenotypic ratio?

• TT x tt

• Tt x Tt

• TT x TT

• tt x tt

What does a node on a phylogenetic tree represent?

• The end of a species

• A common ancestor shared by the lineages branching from it

• A mutation event

• The extinction of a species