unit 3: t&r test

Three tigers have different parents and were raised in different environments. They all

have the same proteins for stripe pattern in their cells. What can you say about their

stripe patterns?

• They will have the same stripe patterns since all tigers have the same stripe

  patterns even if they were raised in different environments.

• They will have the same stripe patterns since their proteins connect in the

  same ways to determine stripe patterns.

• They will have different stripe patterns since different environments will

  always cause the proteins to connect differently.

• They will have different stripe patterns since only offspring from the same

  parents have the same stripe patterns.

Two goldfish are living in two different fish tanks. One fish has a split tail and the

other does not. Why do the goldfish have tails with different shapes?

• Each goldfish has a different tail shape because they ate different proteins in

  their environments, and so have different proteins in their cells.

• Each goldfish has a different tail shape because they have different versions

  of the gene for tail shape that work together to create different proteins.

• The goldfish have different versions of the gene for tail shape. The genes

  are split inside one goldfish’s tail but not inside the other’s.

• The goldfish have different versions of the gene for tail shape, which instruct for

  different proteins that make different tail shapes.

A young goat has downward-curved horns. Its father has upward-curved horns

while its mother has downward-curved horns. Which of these statements explains

why the young goat has downward-curved horns?

• The young goat inherited one copy of the gene for horn shape from its

  mother and one copy from its father. That gene combination instructs for

  proteins that make its downward-curved horns.

• The young goat inherited one copy of the gene for horn shape from its

  mother and one copy from its father. It must have lived in the same

  environment as its mother which resulted in its downward-curved horns.

• The young goat inherited its copies of the gene for horn shape from its

  mother and not from its father. Just like its mother’s genes, those genes

  instruct for proteins that make its downward-curved horns.

• The young goat inherited its copies of the gene for horn shape from its

  mother and not from its father. Those genes connect together to make its

  downward-curved horns.

Sh’qira reads an article about a family of wildcats. One of them had a mutation for

tooth sharpness. Which of these statements about the wildcat with the mutation

is true?

• There must have been a change in the wildcat’s genes.

• The wildcat must have sharper teeth.

• There will be no change to the wildcat’s teeth.

• The wildcat must have less sharp teeth.

There are two junco birds that each have different proteins in their cells for beak

pointiness. They were raised in the same environment by different parents. What

can you say about their beak pointiness?

• They will have the same beak pointiness since beak pointiness is only

  determined by what environment the birds were raised in.

• They will have different beak pointiness since offspring from different

  parents will have different beak pointiness.

• They will have different beak pointiness since their proteins will connect in

  different ways to determine beak pointiness.

• They will have the same beak pointiness since all junco birds have the

  same beak pointiness even if they were raised in different environments.

Two rabbits live in two different environments. One rabbit has ears that flop

over, and the other rabbit has ears that stand straight up. Why do the rabbits

have ears with different shapes?

• The rabbits have different versions of the gene for ear shape. The genes

  are only standing straight up in the cells of one rabbit’s ears.

• The rabbits have different versions of the gene for ear shape, which

  instruct for different proteins that make differently shaped ears.

• Each rabbit has a different ear shape because they ate different proteins in

  their environments, and so have different proteins in their cells.

• Each rabbit has a different ear shape because they have different versions

  of the gene for ear shape that work together to create different proteins.

A father sheep has curly wool while a mother sheep has straight wool. Which of

these statements explains why one of their baby lambs could have curly wool?

• The baby lamb inherited its copies of the gene for wool shape from its father

  and not from its mother. Just like its father’s genes, those genes instruct for

  proteins that make its wool curly.

• The baby lamb inherited its copies of the gene for wool shape from its

  father and not from its mother. Those genes connect together to make its

  wool curly.

• The baby lamb inherited one copy of the gene for wool shape from its father

  and one copy from its mother. That gene combination instructs for proteins

  that make its wool curly.

• The baby lamb inherited one copy of the gene for wool shape from its father

  and one copy from its mother. It must have lived in the same environment as

  its father which resulted in its curly wool.

The body cells of scorpions have proteins that connect together. In one scorpion,

the structure of the proteins in the body cells changed, but the amount of that type

of protein in the cell stayed the same. What happened to the function of that type

of protein?

• The changed protein connects differently, but its function doesn’t change.

• The changed protein connects differently, so its function changes.

• The changed protein connects in the same way, but its function changes.

• The amount of that type of protein stayed the same, so its function doesn’t

  change.

Hannah is trying to figure out how tooth size is determined in two different wolves.

In wolf 1, the copies of the gene are different from each other. In wolf 2, the copies

of the gene are the same as each other. How does this affect how many types of

proteins there are in each tooth cell?

• Wolf 1 has one type of protein for the tooth size feature. Wolf 2 has one type of

  protein for the tooth size feature.

• Wolf 1 has two types of protein for the tooth size feature. Wolf 2 has one

  type of protein for the tooth size feature.

• Wolf 1 has two types of protein for the tooth size feature. Wolf 2 has two

  types of protein for the tooth size feature.

• It is impossible to say anything about proteins from the given information.

There are two bears that both have the same proteins for ear shape in their cells.

The bears have different parents and were raised in different environments. What

can you say about their ear shape?

• They will have the same ear shape since their proteins connect in the same

  ways to determine ear shape.

• They will have the same ear shape since their proteins connect in the same

  ways to determine ear shape.

• They will have different ear shapes since different environments will always

  cause the proteins to connect differently.

• They will have different ear shapes since only offspring from the same parents

  have the same ear shape.