Heredity and Genetics

Tim is a 5th grade boy with brown hair. Neither of Tim's parents has brown hair. Which is the most likely reason Tim has brown hair?

• Brown is Tim's favorite color.

• One of Tim's grandparents has brown hair.

• Tim's mother wanted him to have brown hair.

• Most of the boys in Tim's class have brown hair.

Katie observes three birds sitting on a tree branch in her yard. All birds are red with brown on their chests. Which best explains why the three birds have similar appearances?

• The birds have similar diets.

• The birds live in the same habitat.

• The birds are sitting in the same tree.

• The birds are members of the same population (family).

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Which fact about Texas Horned Lizards is an inherited trait?

• Have flat bodies

• Live in dry areas

• Make nests in sand

• Are a threatened species

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Kara's three sisters have black hair just like their mother. Which most likely explains why Kara has brown hair?

• Kara's father has brown hair.

• Kara is older than her sisters.

• Kara is younger than her sisters.

• Kara's mother prefers brown hair.

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Which is an inherited behavior?

• A dog obeys a command from a trainer.

• A bird builds a nest in order to lay its eggs.

• A hamster runs through a maze to get to the food at the other end.

• A cat goes to the food bowl when its walks into the kitchen.

Which is these is an inherited trait?

• dimples

• long hair

• favorite color

• driving ability

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A bird eats a brightly-colored insect that tastes bad. The bird avoids preying on this type of insect again. This example is best described as

• a physical characteristic

• a learned behavior

• an inherited behavior

• an adaptation

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Which is a learned characteristic?

• dimples

• eye color

• hair color

• reading music

Ken is tall with brown hair and green eyes. He is the fastest member of the swim team. Which characteristic is most likely learned?

• tall

• brown hair

• green eyes

• swimming ability

One of John's friends told him that he had eyes like his father's eyes. Another friend told John that he had a nose like his mother's nose. Why might John have these features?

• John inherited his characteristics from his father.

• John inherited his characteristics from his mother.

• John inherited his characteristics from both parents.