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- 1. Multiple Choice
Inherited traits are:
dependent on diet
acquired during an organism's life
free of mutations
passed on from parent to offspring
- 2. Multiple Choice
The average size of a grocery store chicken has more than doubled in the past century (100 years). What is the most likely reason for this change?
Natural selection resulted in a larger species of chicken
Artificial selection created a larger breed of chicken
Mutations occur less frequently in chickens than they did a century ago
Grocery stores used to sell younger chickens
- 3. Multiple Choice
Gregor Mendel observed that pea plant traits did not blend in their offspring. This led him to conclude that:
traits are inherited in separate units
offspring inherit genes from only one parent
pea plants do not have genes
traits are not inherited
- 4. Multiple Choice
Every cell in an organism has the same number of chromosomes, except:
skin cells
neurons
white blood cells
reproductive cells
- 5. Multiple Choice
A gene carries the __________ for a trait.
equipment
instructions
materials
protection
- 6. Multiple Choice
The building blocks of DNA are like alphabet letters, because they:
are each associated with a particular sound
can be used in a variety of languages
each have an uppercase and a lowercase form
spell out different instructions depending on their order
- 7. Multiple Choice
Genes influence an organism's traits by coding for:
cells
proteins
chromosomes
DNA
- 8. Multiple Choice
Genetic mutations are ________ harmful.
always
usually
sometimes
never
- 9. Multiple Choice
How do mutations affect natural selection?
They slow down the process
They prevent organisms from evolving
They affect how likely an organism is to survive and reproduce
They are the leading cause of extinction
- 10. Multiple Choice
How is editing the genetic code different from artificial selection?
It enables humans to influence the inheritance of DNA
It enables humans to directly change DNA
It can only be used on animal DNA
It is not yet possible to edit the genetic code
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