7 th Grade Science Genetics Review

Transcription

1 7 th Grade Science Genetics Review

2 #1 The passing of traits from one generation to the next. A: Dominant traits B: Heredity C: Trait acquisition D: None of these

3 B. Heredity

4 #2 Which would result in the most diverse offspring? Planting a potato Bees pollinating from the A: cutting to grow into a B: flower of one plant to the new potato flower of another C: A flower self-pollinating D: None of these

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

6 #3 Mom and dad both have brown eyes. They have two children who also have brown eyes. This would be an example of a/an A: Earned trait B: Acquired trait C: Inherited trait D: Learned trait

7 C. Inherited trait

8 #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. A: dominant \ recessive B: internal \ external C: recessive \ dominant D: external \ internal

9 C. recessive/dominant

10 #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? All reproduced A: asexually from a B: common parent All were reproduced sexually from a single pair of parents C: Both D: Neither

11 A. All reproduced asexually from a common parent

12 #6 Of what chemicals are chromosomes made? A: Glucose B: NBA C: DNA D: RNA

13 C. DNA

14 #7 Reproduction where offspring come from a single parent, and inherit the genes of that parent only. A: Asexual reproduction B: Sexual reproduction C: Both D: Neither

15 A. Asexual reproduction

16 #8 Reproduction where a new organism is created when cells from two organisms combine. A: Asexual reproduction B: Sexual reproduction C: Both D: Neither

17 B. Sexual reproduction

18 #9 What type of reproduction will give you the most diverse offspring (many different types of offspring)? A: Asexual reproduction B: Sexual reproduction C: Both D: Neither

19 B. Sexual reproduction

20 #10 *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 B: Sexual reproduction C: Both D: Neither

21 A. Asexual reproduction

22 #11 *A littler of kittens *A bee transferring pollen from one plant to another. These are examples of. A: Asexual reproduction B: Sexual reproduction C: Both D: Neither

23 B. Sexual reproduction

24 Traits #12 # of student exhibit the trait Brown hair 30 Attached ear lobe 9 Widows Peak 14 Tongue Rolling 22 Which of the traits in this chart is most likely a dominant trait? A: Brown hair B: Attached ear lobe C: Widows Peak D: Rolling Tongue

25 A. Brown Hair

26 Y Yellow y - Green y y Y Yy Yy y yy yy #13 In a pea plant, the color yellow is dominant and green is recessive for flowers. If a heterozygous yellow pea plant and a homozygous green pea plant are crossed, what color seeds will result? 75% Yellow A: B: 25% Green 50% Yellow 50% Green 25% Yellow C: D: 75% Green 100% Yellow 0% Green

27 B. 50% Yellow 50% Green

28 F Free f - Attached F f F FF Ff f Ff ff #14 In people, free earlobes are dominant and attached earlobes are recessive. Both mother and father are hybrid for free earlobes. What are the offspring? 75% Free A: B: 25% Attached 50% Free 50% Attached 25% Free C: D: 75% Attached 100% Free 0% Attached

29 A. 75% Free 25% Attached

30 #15 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? Because of interbreeding within the same population of Devils with identical genes. A: B: Because of breeding with Devils of other populations with different genes. C: Both D: Neither

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

32 It would continue to survive and reproduce due to interbreeding of the population. #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. A: B: 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. C: Both D: Neither

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

34 Great Job!!!! Thank you for playing!