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Second Quarter EOC Review

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1 Second Quarter EOC Review

2 Remember!!! All LIVING things need energy for
necessary life functions!! Energy comes from the sun. Producers capture light energy and store it in food molecules. Energy in food is broken down by cellular respiration. Energy in foods provide organisms the fuel necessary for work such as reproduction.

3 Photosynthesis Plants are autotrophs (make their own food)
Occurs in chloroplast inside leaf cells Chlorophyll is a green pigment that absorbs sunlight 6CO2 + 6H2O  C6H12O6 + 6O2 Affected by light, temperature and water

4 Organisms that Photosynthesize
Some Bacteria Euglena (Protist) Plant cell Green Algae (Protist) All plants

5 Cellular Respiration Occurs in ALL LIVING things
Releases energy by breaking down GLUCOSE Occurs in the mitochondria C6H12O6 + 6O2  6CO2 + 6H2O Produces 36 ATP Plants go through cellular respiration at night

6 2 Types of Cellular Respiration
1. Aerobic respiration – does require oxygen Occurs in the mitochondria Produces more ATP than Anaerobic Respiration 2. Anaerobic respiration- does NOT require oxygen -Occurs in the cytoplasm

7 2 Types of Anaerobic Respiration
1) Alcoholic fermentation Occurs in Yeast cells Produces CO2 & Alcohol (2 ATP) 2) Lactic acid fermentation Occurs in Muscle cells (strenuous activity) Occurs in bacteria cells (used in making yogurt) Produces lactic acid

8 Electron Transport Chain
Cellular Respiration Occurs in cytoplasm Occurs in mitochondria Carbon dioxide + Water 36 ATP Krebs Cycle 2 ATP Electron Transport Chain 32 ATP Glycolysis 2 ATP Glucose + Oxygen = anaerobic aerobic

9 Comparing Photosynthesis and Cellular Respiration
Function Stores Energy Energy release Location Chloroplast Mitochondria Reactants Carbon dioxide and water Glucose and oxygen Products

10 Photosynthesis & Cellular Respiration
Balances CO2 in the ecosystem

11 The Cell Theory All LIVING things are made up of cells.
2. Cells are the basic units of life. 3. New cells come from existing cells.

12 Asexual Reproduction Production of offspring by a single parent
Offspring are genetically identical Process -Mitosis (asexual reproduction of body cells) Five types: 1) Binary Fission 2) Budding 3) Regeneration 4) Sporulation 5) Vegetative Sporulation

13 Types of Asexual Reproduction
Binary Fission Sporulation Budding Vegetative Propagation Regeneration

14 Sexual Reproduction Two parent cells join together to form a new individual Sex cells (sperm & egg) produced by meiosis (Meiosis= reproduction cells) Fertilization – combining of sex cells Offspring are different from parents Occurs in worms, insects, amphibians, plants and mammals

15 Sexual Reproduction

16 Types of Fertilization
1) Internal Fertilization: Occurs inside females body Example: reptiles, birds, and most land animals 2) External Fertilization: Occurs outside the females body Example: Frogs and Fish

17 Types of Development 1) Internal Development:
Occurs inside females body Example: most land animals and dolphins 2) External Development: Occurs outside the females body Example: Frogs and Fish

18 Asexual Reproduction Sexual Reproduction
Starts with one cell Starts with two cells One cell splits to form two new cells Two cells combine to form new organism New cells are genetically identical to parent cell New organism is genetically different from parent cells -Reproduction for unicellular organisms -Growth and development for multicellular organisms -Involves production and fusion of gametes

19 THE CELL CYCLE Series of events that cells go through as they grow and divide Consists of four phases: G1 PHASE – CELL GROWTH S PHASE – CHROMOSOME REPLICATION G2 PHASE – PREPARATION FOR MITOSIS M PHASE – MITOSIS AND CYTOKINESIS

20 Mitosis Asexual reproduction DNA condenses into chromosomes
Cells are Diploid (2N) “have paired chromosomes” Four phases of Mitosis: (Hint: PMAT) 1st P= Prophase 2nd M= Metaphase 3rd A= Anaphase 4th T= Telophase

21 Meiosis Sexual reproduction Two cell divisions
(Meiosis I and Meiosis II) Produces four haploid (N) cells “chromosomes unpaired” Produces gametes “sperm & egg cells” Crossing Over Increases genetic variation

22 Lets Compare Meiosis to Mitosis!!
Starts with diploid cell One nuclear division Ends with two diploid cells (2N) Asexual reproduction Produces body cells Meiosis Starts with diploid cell Two nuclear divisions Ends with four haploid cells (N) Sexual reproduction Produces gametes

23 GENETICS

24 Mendelian Genetics Punnett squares- used to show probability in genetic crosses Probability – chance of an event happening Simple traits governed by two alleles Alleles – alternate forms of a gene (AKA: LETTERS) Dominant allele= CAPITAL LETTERS Recessive allele= lowercase letters (Dominant masks recessive) Genotype – genetic make up (letters) Homozygous – same alleles (AA) Heterozygous – different alleles (Aa) Phenotype – organism’s physical appearance (looks) EXAMPLE: Brown Hair or Blue Eyes Test Cross: Always homozygous recessive

25 Monohybrid Cross (one set of traits)
In guinea pigs, black fur is dominant to white fur. Cross two heterozygous Black guinea pigs. Parents: Bb x Bb Genotypic Ratio: 1 BB: 2 Bb: 1 bb Phenotypic Ratio: 3 black: 1 white b B BB Bb B bb b Bb

26 Remember!! NOT ALL traits follow Mendel’s Law of dominance.
These are complex inheritance patterns. Incomplete dominance Codominance Multiple alleles Polygenic Inheritance

27 Incomplete Dominance (BOTH genes BLEND)
Four O'clock flowers In Four O'clock Plants One allele is not completely dominant over the other Both alleles are partially expressed Produces a 3rd phenotype (Pink) Remember: Capital letters only, NO recessive letters Alleles: Key: R = Red RR = Red W = White RW = Pink WW = White Image from:

28 Cross two pink-flowered plants
Incomplete Dominance Cross two pink-flowered plants Parents: RW X RW R W Genotypic Ratio: 1 RR: 2 RW: 1 WW Phenotypic Ratio: 1 Red: 2 Pink: 1 White RR RW R RW WW W

29 Codominance Both traits are expressed at the same time (NO BLENDING)
Both alleles are completely expressed Results in a 3rd phenotype (checkered) In chickens: Black and White alleles are both dominant In blood groups: Alleles IA and IB are codominant Remember: Capital letters only, NO recessive letters Image from:

30 Cross a black chicken (B) with a white chicken (W)
Codominance Cross a black chicken (B) with a white chicken (W) Parents: BB X WW B B Genotype: 4 BW W BW BW Phenotype: 4 Checkered Chickens W BW BW

31 Multiple Alleles Types A, B, AB, O Type A:
Four Human Blood Groups Types A, B, AB, O Type A: IA IA (homozygous dominant) or IAi (heterozygous dominant) Type B: IB IB (homozygous dominant) or IBi (heterozygous dominant) Type AB: IA IB (Codominant) Type O: ii (only recessive blood group) Image from: Determined by three alleles (IA, IB, & i)

32 Multiple Alleles: Cross a heterozygous type A person (IAi) with a heterozygous type B (IBi) person
Parents: IAi X IBi IA i Genotypic Ratio: 1 IAIB 1 IAi 1 IBi 1 ii Phenotypic Ratio: 1 Type AB 1 Type A 1 Type B 1 Type O IAIB IBi IB IAi ii i

33 Multiple Alleles: Cross a male type O person (ii) with a female type AB (IAIB) person
Parents: ii X IA IB i i Genotypic Ratio: 2 IAi 2 IBi Phenotypic Ratio: 2 Type A 2 Type B IAi IAi IA IBi IBi IB

34 Polygenic Inheritance
Determined by more than one gene (A, B, C, D) Results in a broad range of phenotypes AABBCCDD – darkest (dominant) AaBbCcDd – intermediate aabbccdd – lightest (recessive) Examples: Skin color, eye color, height Forms bell shape when graphed Intermediates are more common

35 Human Heredity

36 Human Chromosomes (one chromosome from mom and one from dad)
Karyotype – A picture of a person’s chromosomes Shows genetic disorders Shows gender In humans 1st -22nd pairs are called autosomes 23rd pair are called sex chromosomes Sex chromosomes are XY – males (BOY) (one large, one small) XX – females (two matching large) Image from:

37 Karyotypes Normal Female Normal Male

38 Pedigree (used to trace traits) Look at the Pedigree and see if you can find the pictures that are represented on the Key Image from: Key Who are siblings? Who is married? Who is affected with a trait? Who is unaffected? -Sara, Joe, and Jim -Tim and Lori -Tom and Sue -Jim and Kay Sue, Joe, Jim and Tim Tom, Sara, Jeri, Lori, and Kay

39 Autosomal Recessive Alleles “Defect on chromosomes 1-22”
Lack an enzyme necessary to break down Phenylalanine Lack of pigment Accumulation of mucus in the lungs Albinism, Cystic Fibrosis, PKU, and Tay Sachs Nervous tissue deterioration

40 Dominant Alleles disorder “one dominant allele needed to be expressed”
Deterioration of brain and nervous system Heads and limbs not proportional to body torso Achondroplasia and Huntington's Disease

41 Down Syndrome, Turners, and Kleinfleters
Chromosomal disorders “caused by nondisjunctions; chromosomes fail to separate” Male has an extra X chromosome Extra 21st chromosome Female missing one X chromosome Down Syndrome, Turners, and Kleinfleters

42 Chromosomal Disorders Karyotype
Down Syndrome Kleinfleters Syndrome Turners Syndrome

43 Sickle-Cell Disease (Both alleles are equally expressed)
Caused by codominant alleles S - sickle blood N – normal blood More common in African Americans Heterozygotes(NS) in Africa are immune to Malaria Clumping of blood cells N S N NN NS S NS SS

44 Sex-linked Genes More often expressed in males than females Example:
Found on sex chromosomes (Only on the X chromosome) More often expressed in males than females **Why? Because males inherit the X chromosome from their mother Example: Colorblindness Hemophilia Image from:

45 Sex-Linked Genes Color blindness Hemophilia
Individuals have a hard time distinguishing between colors Individuals lack clotting factor in blood

46 Biology – Second Quarter Review
NC DPI Sample EOC Questions

47 Cellular respiration is carried out by which of the following?
A. all living organisms all of the time B. animals but not plants C. animals all of the time but plants only at night D. heterotrophs but not autotrophs

48 2. Two students set up the following apparatus in a lab. A pipette was
filled with a mixture of yeast and apple juice and inverted in a test tube filled with warm water. The students observed bubbles being released from the end of the pipette. Which of the following most likely represents the gas being released? A. carbon dioxide B. hydrogen peroxide C. oxygen D. nitrogen

49 3. Which of the following processes
3. Which of the following processes releases the most ATP per molecule of glucose for immediate cell use? A. aerobic respiration B. anaerobic respiration C. chemosynthesis D. photosynthesis

50 4. Which statement is true regarding asexual reproduction as a method of
producing offspring? A. common among mammals B. not a method used by plants C. produces offspring that are genetically identical D. limited to unicellular organisms

51 5. Which process is responsible for the diversity of plants within a species?
A. cross-pollination B. transpiration C. self-fertilization D. photosynthesis

52 6. Which of the following demonstrates the
most significant difference between asexual and sexual reproduction? A. The chromosome number is reduced during asexual reproduction. B. The number of chromosomes is reduced during sexual reproduction. C. The appearance of the organism is changed as a result of asexual reproduction. D. There is genetic variation as a result of sexual reproduction.

53 7. What is true about any two normal
gametes from a human male parent? A. Each has a diploid number of chromosomes. B. They can combine to form a new organism. C. Their chromosomes are exactly the same. D. They have the same number of chromosomes.

54 8. A cell has undergone a meiotic division cycle
8. A cell has undergone a meiotic division cycle. In order for the cell to achieve a diploid state, what must occur? A. cleavage B. fertilization C. meiosis D. mitosis

55 9. A human skin cell contains 46 chromosomes
9. A human skin cell contains 46 chromosomes. How many chromosomes are present in a human sperm cell? A. 23 B. 46 C. 92 D. 138

56 10. Some traits are determined by
more than two alleles. If aabbcc is crossed with AABBCC, what would be the genotype of the offspring? A. AaBbCc B. AABBCC C. aabbcc D. aaAAbbBBccCC

57 11. In a genetics laboratory, two
heterozygous tall plants are crossed. If tall is dominant over short, what are the expected phenotypic results? A. 100% tall B. 75% tall, 25% short C. 50% tall, 50% short D. 25% tall, 75% short

58 12. Mr. Jones has blood type A and Mrs.
Jones has blood type AB. What is the probability that they will have a child with blood type A if both of Mr. Jones’s parents were AB? A. 0% B. 25% C. 50% D. 100%

59 13. Color blindness is a sex-linked recessive trait
13. Color blindness is a sex-linked recessive trait. A mother with normal color vision and a color blind father have a color blind daughter. Which of the following statements is correct? A. All of their daughters will be color blind. B. The mother is a carrier of the color blindness gene C. All of their sons will have normal color vision. D. All of their sons will be color blind.

60 14. In sickle cell anemia, the heterozygous condition results in resistance to malaria. If two heterozygous parents have a child, what are the chances of that child being resistant to malaria but not having sickle cell anemia? A. 25% B. 50% C. 75% D. 100%

61 15. In guinea pigs, the allele for rough
coat (R) is dominant to the allele for smooth coat (r). A rough coat male and a smooth coat female mate. They produce several litters, of which 50% are rough coat and 50% are smooth coat. What were the genotypes of the parents? A. RR × rr B. Rr × rr C. RR × Rr D. Rr × Rr

62 16. Which genotype is used in a test
cross? A. homozygous dominant B. heterozygous dominant C. homozygous recessive D. heterozygous recessive

63 17. After performing amniocentesis,
which analysis is most often used to determine the chromosomal condition of a developing fetus? A. blood type B. DNA sequence C. genetic marker D. karyotype

64 18. When viewing a karyotype to detect genetic disorders, which of the following would be a concern?
A. different chromosomes of different lengths B. two X chromosomes C. twenty-three pairs of chromosomes D. three chromosomes in any one set

65 19. Albinism is a genetic mutation that results in
some animals being born without the enzyme that produces the pigment for skin and eye color. Which of the following best explains this mutation? A. The DNA failed to replicate. B. The deoxyribose sugar became separated from the DNA. C. The genetic code change caused the wrong protein to form. D. The RNA necessary to produce proteins was not present.

66 20. A student has cystic fibrosis, a genetic condition
caused by the presence of a homozygous recessive gene. What could be her parent’s genotypes for the cystic fibrosis trait? A. Her father is homozygous dominant; her mother is homozygous recessive. B. Her father is heterozygous; her mother is homozygous dominant. C. Her father is homozygous dominant; her mother is homozygous dominant. D. Her father is heterozygous; her mother is homozygous recessive.

67 21. The bacteria that cause tetanus can survive in a puncture wound that has healed on the outer surface of the skin. Through what process do these bacteria acquire the energy they need to survive? A. aerobic respiration B. anaerobic respiration C. chemosynthesis D. photosynthesis

68 22. In terms of ATP production, which process results in the most stored energy?
A. aerobic respiration B. anaerobic respiration C. fermentation D. photosynthesis

69 23. Which statement best distinguishes
aerobic from anaerobic respiration? A. Only aerobic respiration involves fermentation. B. Only anaerobic respiration occurs in the mitochondria. C. Only aerobic respiration requires oxygen. D. Only anaerobic respiration produces carbon dioxide.

70 24. Which most accurately describes the difference in ATP
production between aerobic respiration and anaerobic respiration? A. Aerobic respiration produces more ATP than anaerobic respiration. B. Anaerobic respiration produces more ATP than aerobic respiration. C. Only anaerobic respiration produces measurable amounts of ATP. D. Anaerobic and aerobic respiration produce the same amount of ATP.

71 25. Before a cell goes through either
mitosis or meiosis, which process must be carried out by the DNA in the nucleus? A. replication B. nondisjunction C. transcription D. translation

72 26. Sexual reproduction provides for what
to occur? A. cloning B. budding C. genetic stability D. genetic variation

73 27. Which term best describes the type
of cell division in which parent cells produce daughter cells with the same number of chromosomes as the parent cells? A. mitosis B. meiosis C. spermatogenesis D. oogenesis

74 28. What is the primary cause of
variation in the offspring of sexually reproducing organisms? A. cytoplasmic division B. environmental changes C. mutation D. recombination of alleles

75 29. Which is responsible for most
genotypic and phenotypic variation among humans? A. meiosis B. budding C. mitosis D. regeneration

76 30. In genetics research, what is the
purpose of a test cross? A. to determine the phenotypes of the parents B. to determine the genotypes of the parents C. to determine whether or not two parents could produce viable offspring D. to determine how many offspring can be produced by two parents

77 31. Most sex-linked, recessive traits–including hemophilia
and colorblindness–appear in males. This phenomenon is best explained by which statement? A. Males have an X chromosome with dominant genes. B. Most of the genes on the X and Y chromosomes of males are recessive. C. In males, the recessive sex-linked genes appear only on the Y chromosome. D. In males, the Y chromosome lacks the genes needed to mask the recessive genes on the X chromosome.

78 32. A karyotype of a human female shows
that she has only one sex chromosome. Which genotype would represent her genetic condition? A. XO B. XXX C. XY D. XYY

79 That was 


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