7 th Grade Science Genetics Review

A:B: Dominant traits Heredity C:D: Trait acquisitionNone of these #1 The passing of traits from one generation to the next.

B. Heredity

A:B: Planting a potato cutting to grow into a new potato Bees pollinating from the flower of one plant to the flower of another C:D: A flower self-pollinatingNone of these #2 Which would result in the most diverse offspring?

B. Bees pollinating from the flower of one plant to the flower of another

A:B: Earned trait Acquired trait C:D: Inherited traitLearned trait #3 Mom and dad both have brown eyes. They have three children who also have brown eyes. This would be an example of a/an _______ _______

C. Inherited trait

A:B: dominant \ recessiveinternal \ external C:D: recessive \ dominantexternal \ internal #4 A brown haired and a blond haired parent have two children, both with brown hair. The hidden blond hair is said to be _________ The visible brown hair is said to be __________.

C. recessive/dominant

A:B: All reproduced asexually from a common parent All were reproduced sexually from a single pair of parents #5 When looking at DNA of three unknown organisms, you find that they all have the same sequence of DNA. Which statement below is the most logical explanation? C:D: BothNeither

A. All reproduced asexually from a common parent

A:B: GlucoseNBA C:D: DNARNA #6 Of what chemicals are chromosomes made?

C. DNA

A:B: Same gene combinations lead to different traits. Different gene combinations lead to different traits. #7 Why are brothers and sisters different from one another if they have the same parent? C:D: The genetic code in the DNA of females is always stronger than in males. None of these

B. Different gene combinations lead to different traits.

A:B: Asexual reproductionSexual reproduction C:D: BothNeither #8 Reproduction by which offspring come from a single parent, and inherit the genes of that parent only.

A. Asexual reproduction

A:B: Asexually By cell division C:D: BothNeither #9 How can a single celled organism can receive its traits?

C. Both

A:B: Asexual reproductionSexual reproduction #10 Reproduction where a new organism is created when cells from two organisms combine. C:D: BothNeither

B. Sexual reproduction

A:B: Asexual reproductionSexual reproduction #11 What type of reproduction will give you the most diverse offspring (many different types of offspring)? C:D: BothNeither

B. Sexual reproduction

A:B: Asexual reproductionSexual reproduction C:D: BothNeither #12 *A Starfish re-growing an arm when cutoff. *Placing a piece of potato in a pot of soil. These are examples of ________ _________.

A. Asexual reproduction

A:B: Sexual reproduction C:D: BothNeither Asexual reproduction #13 *A littler of kittens *A bee transferring pollen from one plant to another. These are examples of ______ _________.

B. Sexual reproduction

A:B: Two cells that join together Two cells that each have half as many chromosomes C:D: Four cells that each have half as many chromosomes None of these #14 What results when a cell divides to produce gametes?

B. Two cells that each have half as many chromosomes

A:B: Brown hair Attached ear lobe C:D: Widows Peak Rolling Tongue #15 Traits# of student exhibit the trait Brown hair30 Attached ear lobe9 Widows Peak14 Tongue Rolling22 Which of the traits in this chart is most likely a dominant trait?

A. Brown Hair

A:B: Because of interbreeding within the same population of Devils with identical genes. Because of breeding with Devils of other populations with different genes. C:D: Neither Both #16 Scientists have discovered that Tasmanian Devils are descended from the same family. As a result, all of the Devils in the population have almost identical sets of genes. Although they reproduce sexually, this population is similar to a population that reproduces asexually. Why is this sexually reproducing population of Tasmanian devils similar to a population of organisms that reproduce asexually?

A. Because of interbreeding within the same population of Devils with identical genes.

A:B: C:D: Both Neither #17 Scientists have discovered that Tasmanian Devils are descended from the same family. As a result, all of the Devils in the population have almost identical sets of genes. Although they reproduce sexually, this population is similar to a population that reproduces asexually. If a disease strikes the Tasmanian Devil Population, what is most likely to happen to their population? It would all die because the disease would be spread due to interbreeding of the population. It would continue to survive and reproduce due to interbreeding of the population.

B. It would all die because the disease would be spread due to interbreeding of the population.

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