Science · Genetics
Genetics Basics Quiz
Genes, DNA, traits and Punnett squares: an introduction to heredity.
- 🎓 Grades 7–8
- 🧪 Science
- 📐 MS-LS3-2
- ❓ 20 questions
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What is heredity?
- A How rocks form
- B How plants make food
- C A type of cell
- D Passing traits from parents to offspring
Heredity is why children often look like their parents.
What are sections of DNA that code for traits called?
- A Genes
- B Organs
- C Cells
- D Atoms
What shape is a DNA molecule?
- A Flat sheet
- B Square
- C Double helix
- D Single circle
Who is called the father of genetics?
- A Louis Pasteur
- B Gregor Mendel
- C Galileo Galilei
- D Isaac Newton
What plants did Mendel study?
- A Corn
- B Roses
- C Oak trees
- D Pea plants
Different forms of the same gene are called…
- A Cells
- B Proteins
- C Chromosomes
- D Alleles
An allele that hides another allele is…
- A Hybrid
- B Mutant
- C Dominant
- D Recessive
An allele that is hidden when a dominant one is present is…
- A Dominant
- B Strong
- C Recessive
- D Lethal
What tool predicts the possible traits of offspring?
- A Punnett square
- B Microscope
- C Periodic table
- D Food web
An organism with two identical alleles (TT) is…
- A Heterozygous
- B Hybrid only
- C Homozygous
- D Recessive
An organism with two different alleles (Tt) is…
- A Extinct
- B Purebred
- C Homozygous
- D Heterozygous
What is a genotype?
- A Its habitat
- B Its food source
- C Its outward appearance
- D The alleles an organism has
What is a phenotype?
- A A type of cell
- B The trait you can observe
- C The gene letters
- D A chromosome
How many chromosomes do most human body cells have?
- A 23
- B 64
- C 12
- D 46
How many chromosomes come from each parent?
- A 46
- B 23
- C 2
- D 12
In Tt × Tt, what fraction of offspring will likely show the recessive trait?
- A 3/4
- B 1/2
- C 0
- D 1/4
A change in a gene's DNA is called a…
- A Mutation
- B Fossil
- C Habitat
- D Mitosis
Which trait is inherited?
- A Eye color
- B A scar
- C A short haircut
- D Speaking French
Which trait is learned, not inherited?
- A Hair color
- B Blood type
- C Riding a bike
- D Freckles
How does sexual reproduction affect offspring?
- A They are exact copies of one parent
- B They get only dominant genes
- C They get genes from two parents
- D They have no genes
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