6th-8th Grade Science Review

What is the probability of Individual E being able to taste the bitter chemical based on the alleles shown in Figure 1?

• 25%
• 50%
• 75%
• 100%

What do alleles represent in genetics?

• The physical appearance of an organism
• The instructions for a specific trait passed from parent to offspring
• The environment in which an organism lives
• The generation of the organism

Why do some individuals have different abilities to taste certain chemicals?

• Due to random chance
• It is influenced by environmental factors alone
• Genetics and inherited traits play a role
• Option 4

How do environmental factors impact genetic traits?

• Environmental factors have no impact on genetic traits
• They can change an individual's genetic makeup
• They determine which traits are dominant or recessive
• Environmental factors only affect physical traits

Based on the information provided, what determines whether an individual can taste the bitter chemical?

• The individual's age
• Their favorite foods
• Genetic inheritance
• The amount of sleep the individual gets

Which of the following is a characteristic of a dominant trait? Choose ALL that apply.

• It is always present in an individual if one parent has the trait.
• It is only present in certain genders
• It can mask the presence of a recessive trait
• It skips generations in a family

How do genetic traits contribute to the diversity of living organisms?

• By ensuring all individuals have the same traits
• By creating variation within a species
• By preventing any changes in an organism's traits
• By only allowing certain traits to be inherited

What role do mutations play in genetic diversity?

• Mutations decrease genetic diversity
• Mutations have no effect on genetic diversity
• Mutations increase genetic diversity
• Mutations can only occur in dominant traits

How can individuals adapt to changes in their environment over time?

• By changing their genetic makeup
• By passing on new genetic traits to their offspring
• By avoiding all environmental changes
• By never interacting with the environment

In the picture, what do the capital letter represent regarding genetic traits?

• Dominant traits
• Recessive traits
• Genetic mutations
• Environmental influences