Unit 1 Study Guide Answers

• Hair is tied back
• Closed toed shoes
• No loose clothing

2.

• Run water over your skin for at least 5 minutes.

3. Gram

4. Meter

5. Liter

6. 0.00352 km

7. 24L = 24 L (this was a typo - sorry!)

8. a. 1 cm

b. 1 KL

c. 10 g

9. a. coffee

b. time to complete problems

c. group b (no special treatment)

d. they complete the same problems, same age, same level of math

10. a. Does drinking milk affect growth rate?

b. Milk causes increased growth.

c. 10 randomly chosen babies with the same birthdate. After they turn 5 years old, Group drinks 2 cups of milk every day. Group B drinks 2 cups of water instead. Measure growth after 10 years.

11. cohesion (water sticking to itself)

12. high specific heat (water's ability to absorb heat)

13. adhesion - water sticking to other molecules; cohesion - water sticking to other water molecules.

Unit 1 Notes

Scientific Method

Metric System

Graphing

Properties of Water

2nd Semester Study Guide Answers

1.  Differentiate between
a. Homozygous & Heterozygous - Homozygous 2 copies of the same allele; Heterozygous 2 different copies of the allele
b. Dominant & Recessive - Dominant, usually a capital letter always shows up when present; Recessive, usually a lower case letter, only shows up when there are two copies of it
c. RNA & DNA - DNA has two strands, thymine (T), and deoxyribose, RNA has one strand, uracil (U), and ribose
d. Genes & alleles - genes - DNA that codes for a physical trait; alleles - different forms of a gene
e. Haploid & diploid - Haploid - sex cells, cells with one copy of chromosomes; Diploid - body cells, cells with 2 copies of chromosomes
f. Transcription & translation - transcription mRNA copying DNA; translation - mRNA translated into amino acids
g. positive feedback & negative feedback - positive feedback - brain pushes body farther away from normal before going back; negative feedback - brain brings body back to normal right away
h. arteries & veins - arteries bring blood away from the heart; veins bring blood back to the heart.

2.

• camouflage
• padded feet for running
• muscular build to hunt

3.  genetic, population, time

4.  variation creates competition. without variation, there would be no competition for survival

5.  Sam and his friends have long necks due to their genes. Because of that, they ate better than other tortoises and passed on their genes.

6. 46

7. 2

8. 75%

9. 50% (it's always 50%)

10. A trait that is on the X-Chromosome

11. colorblindness, hemophilia

12. 0%, 0%

13. a. Red; b. red & white; c. orange (or any other color that is not red or white)

14. (ask Mrs. Sohn in class)

15. half of the original is saved to make the new strand

16. DNA - ATCG; RNA- AUCG

17. A-T; C-G

18. mRNA

19. tRNA

20. a. GCG ATA CTC AAT; b. TAC GCA CTA GCT

21. a. UCC CCG GGA AAU; b. GAU AGU CUU GGA

22. 3 bases that code for an amino acid

23. 15

24. C, B, D, A

25. dendrites receive signal from another neuron;

26. holds the signal inside the axon

27. pain killers block receptors 

28. chemicals that are released into the blood stream that cause changes in the body

29. both are involved in communication inside the body

30. alveoli

31. body is alerting you to danger; example - spider bite that swells and gets increasingly painful

32. 4

33. 1st line of defense - skin, hair, mucous; 2nd line - white blood cell, inflammatory response

34. antibodies pull the different pathogens together to be eaten by a white blood cell

35. they force your body to develop T-cells that are targeted to fight the pathogens

36. HIV -  virus infection; AIDS - when T-cell counts drop to a very low level

37. energy available in food

38. Condoms

39. prevent ovulation; prevents fertilized egg from implanting in the uterus

40. (various - HIV, herpes, chlamydia)

Evolution Study Guide Answers

1. Variation
2. Natural Selection
3. Evolution
4. Genes
5. Adaptation
6. Fitness
7. Genetic Drift
8. Half-life
9. Alelle Frequency
10. Speciation
11. Founder's Effect
12. Relative Dating
13. Nocturnal (to avoid heat); No fur (to stay cool); Animals are really good at extracting water from food (no need to drink)
14. Because the trees were covered in soot, the once favored light moths suddenly stood out against the dark trees. This made them a more likely target for predators. This caused a rapid change in the genes of the moths. More dark genes were now present in the peppered moth population.
15. (Left to Right, Top to Bottom): 4, 2, 5, 3,1,6,
16. 
17. graph shifts to the left.
18. 10 g.
19. Opposable thumbs, large brains compared to body size, binocular vision, bipedalism
20. Sexual reproducers produce variation every time they produce offspring (minnows, incest = more disease)

Genetics Review Packet (the 4 pages of punnett squares)

1. Dominant - The gene that always shows, usually a capital letter
2. Recessive - The gene that is present only when the dominant gene is not present, usually a lower case letter
3. 1/4 (triangle) 1:3 (circle) 75% (square)
4. a. gene b. homozygous c. punnett square d. genotype e. phenotype f. ratio g. probability
5. a. heterozygous b. heterozygous c. homozygous dominant d. heterozygous e. homozygous recessive f. homozygous recessive g. homozygous dominant h. heterozygous
6. 25% - BB 50% - Bb 25% - bb
7. 0% - BB; 50% - Bb; 50% - bb
8. 1/4 BbEe (Black hair/ brown eyes); 1/4 Bbee (Black hair/ blue eyes); 1/4 bbEe (blonde hair/brown eyes); bbee (blonde hair/blue eyes)
9. Parent 1 - rr and Parent 2 - Rr; (rr x Rr) 50% White, 50% Pink
10. Males (XY); Females (XX)
11. Cross XY and XX
12. a. 100% Type O; b. 100% Type AB; c. 50% Type A, 50% Type B
13. a. 2/2 girls with normal vision, 1/2 normal boys, 1/2 boys colorblind; b. 2/2 girls are normal, 2/2 boys are colorblind; c. 2/2 girls are normal, 2/2 boys are normal

Genetics Study Guide Answer

This was today's hand out:

C - Level
1. C. AABbcc will look the same as AaBBcc 
2. Meiosis - makes sex cells, 4 genetically different cells; Mitosis – makes every other cell, 2 genetically identical cells 
3. Tt x Tt = 75% will look like T, 25% will look like t
4. Incomplete Dominance (3rd phenotype appears)
5. XHXh with XHY
a. Daughters with hemophilia – 0% 
b. Sons with hemophilia – 50% 
6. Two organisms may share the same phenotype, but have differing genotype. 
7. Bb x Bb (75% Black, 25% Brown fur)
8. To make genetically different cells
9. Sex cells are also known as gametes. Since they only have 1 set of chromosomes, they are called haploid. Cells with 2 sets of chromosomes are called diploid.
10. 2 brothers!

B – Level
1. Incomplete dominance 
a. RR – red, rr – white, Rr – pink. 
b. rr x Rr = 50% white, 50% pink
2. Key: BB – blue, bb – white, Bb – blue AND white. Bb x Bb = 25% Blue, 25% white, 50% blue and white.
3. ii x IAIB = 50% Type A, 50% Type B
4. (check with Mrs. Sohn in class)
5. XBXB with XbY
a. 0% sons will be colorblind
b. 0% of daughters will be colorblind
6. Key: D – Dark, d – blonde
a. Dd
b. dd
c. 50%

A – Level
1. Dihybrid Cross
a. BbEe
b. bbee
c. ¼
d. ¼ 
2. Males are more likely to inherit sex-linked traits because they only have one X. If there is something wrong with that X, they will always show the trait. They do not have another X to “make up” for that other X.
3. ii x ii; IAi x IAi, IBi x IBi

Protein Synthesis Study Guide

C-Level

1. CTT  CAT  CTG  ACA
2. ACG  AUA  AGU  CCC
3. 4 - (Adenine, Guanine, Cytosine, Thymine)
4. Double Helix
5. Nucleus
6. C. Proteins
7. DNA - 2 strands, RNA - 1 strand
8. met - gly - trp - ser - stop

B&A Level

1. RNA - ribose, uracil; DNA - deoxyribose, thymine
2. 3
3. mRNA
4. mRNA copies one side of the DNA to get the recipe to make the protein
5. the mRNA is translated one codon at a time into an amino acid chain
6. a change in DNA
7. mutations can cause a change in the type of protein produced
8. UCA - serine; UCG - also serine. This mutation resulted in the same amino acid created.
9. D
10. nucleus
11. ribosome
12. amino acids
13. (see notes)
14. mRNA is copying one side of the DNA in the nucleus.
15. mRNA leaves nucleus and is translated into amino acids in the ribosome.