Genetics and Inheritance Patterns

Base your answer to the following question on your knowledge of science. The diagram shows a model of human inheritance. A Punnett square showing the inheritance of hairline traits: A (straight hairline, dominant) and a (peaked hairline, recessive).

• The peaked hairline occurs only in females.

• The peaked hairline is a mutation.

• The straight hairline is recessive.

• The straight hairline is dominant.

Gregor Mendel developed some basic principles of heredity by

• crossing pea plants

• cutting off the tails of mice

• breeding fruit flies

• culturing bacteria in a laboratory

Tags

NGSS.MS-LS3-1

NGSS.MS-LS3-2

NGSS.MS-LS4-4

Mendel studied the inheritance traits in

• four-o'clock flowers

• roan cattle

• fruit flies

• pea plants

What percentage of the offspring will most likely show the dominant trait?

• 25%

• 50%

• 75%

• 100%

If two gray (Gg) mice mated, what percent of their offspring would have pure white fur?

• 25%

• 50%

• 75%

• 100%

Which is a correct gene combination for the parents shown in the diagram?

• GG × GG

• gg × gg

• gg × GG

• Gg × Gg

In canaries, the gene for singing (S) is dominant over the gene for non-singing (s). When Ss singing canaries are mated with ss non-singing canaries, what percentage of the offspring will be able to sing?

• 0%

• 25%

• 50%

• 100%

In dogs, coarse hair (D) is dominant over smooth hair (d). If two coarse-haired dogs produce a smooth-haired pup, the genotypes of the parent dogs are most likely:

• A) DD and Dd

• B) Dd and Dd

• C) DD and DD

• D) Dd and dd

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NGSS.MS-LS4-4

In owls, red feathers (R) are dominant over gray feathers (r). If two Rr red-feathered owls are mated, what percentage of their offspring would be expected to have red feathers?

• A) 25%

• B) 50%

• C) 75%

• D) 100%

Identify what two offspring from the cross shown above could produce offspring of short plants.

• A) TT × TT

• B) TT × Tt

• C) Tt × Tt

• D) It wouldn't be possible.