Genetics

The drawing below shows a breed of cat known as Munchkin.

• fats

• nutrients

• genes.

• mutations

What characteristic of the barrel cactus is MOST likely the result of an inherited trait?

• Barrel cactus reproduce only from seeds

• Native Americans made pots from barrel cactus

• Birds and rodents help spread barrel cactus seeds.

• Rainstorms sometimes expose the barrel cactus roots

Which characteristic is affected by interactions with the environment?

• weight

• eye color

• blood type

• handedness

Freckles are spots of pigment on the skin. Which statement provides the best argument supported by evidence that this trait is inherited through genetic material passed from parents to children?

• Freckles frequently occur in people with red hair and pale skin.

• Freckles frequently occur in people with red hair and pale skin.

• People with specific genes alleles on a specific gene always have freckles

• People with specific number and type of chromosomes always have freckles

Eye color in human beings is an

• instinct

• acquired trait

• inherited trait

• environmentally influenced trait

A plant growing on a hillside has a stem that curves so that the plant is vertical. This curve is not observed in plants of the same species growing on level ground. Which statement BEST explains the curved stem of the plant growing on the hillside?

• It is a trait for which the plant has no genes.

• It is a trait that is usually detrimental to plant survival.

• It is a trait that developed in response to temperature variations

• It is a trait that is only expressed under particular environmental conditions.

A mouse is placed at one end of a cardboard maze that has a piece of cheese at the other end. The mouse smells the cheese and learns how to find it. The mouse is using an

• acquired trait to gain an inherited trait

• inherited trait to gain an acquired trait

• acquired trait to gain another acquired trait

• inherited trait to gain another inherited trait

Which trait of the salamander pictured below is MOST likely NOT inherited?

• skin color

• body length

• missing limb

• lack of claws

Which of these is NOT an inherited trait in humans?

• height

• hair color

• skin color

• intelligence

Which trait of a pet dog is inherited?

• The dog avoids a pet cat.

• The dog jumps on a sofa

• The dog rolls over on command.

• The dog drools when it smells food