BIOLOGICAL SCIENCE
7th Edition
ISBN: 9780135276822
Author: Freeman
Publisher: PEARSON
expand_more
expand_more
format_list_bulleted
Concept explainers
Videos
Textbook Question
Chapter 4, Problem 14PIAT
QUANTITATIVE In 1951, Erwin Chargaff was accumulating data on the molar ratios of
| Molar Ratios in DNA Preparations | |||||
|---|---|---|---|---|---|
| Source | A:G | T:C | A:T | G:C | purines:pyrimidines |
| Ox | 1.29 | 1.43 | 1.04 | 1.00 | 1.10 |
| Human | 1.56 | 1.75 | 1.00 | 1.00 | 1.0 |
| Chicken | 1.45 | 1.29 | 1.06 | 0.91 | 0.99 |
| Salmon | 1.43 | 1.43 | 1.02 | 1.02 | 1.02 |
| Wheat | 1.22 | 1.18 | 1.00 | 0.97 | 0.99 |
| Yeast | 1.67 | 1.92 | 1.03 | 1.20 | 1.0 |
Source: Chargaff, E. 1951. Federal Proceedings 10" 654–659.
Compare the molar ratios presented from each organism tested and between different organisms. Explain how these data could be used to show that Levene'stetranucleotide model is incorrect. What do they imply about the primary structure of DNA in different organisms?
Expert Solution & Answer
Want to see the full answer?
Check out a sample textbook solution
Students have asked these similar questions
What is the opening indicated by the pointer? (leaf x.s.)
stomate
guard cell
lenticel
intercellular space
none of these
Identify the indicated tissue? (stem x.s.)
parenchyma
collenchyma
sclerenchyma
○ xylem
○ phloem
none of these
Where did this structure originate from? (Salix branch root)
epidermis
cortex
endodermis
pericycle
vascular cylinder
Chapter 4 Solutions
BIOLOGICAL SCIENCE
Ch. 4 - What are the four nitrogenous bases found in RNA?...Ch. 4 - 2. What determines the primary structure of a DNA...Ch. 4 - Prob. 4TYKCh. 4 - Prob. 5TYUCh. 4 - Prob. 6TYUCh. 4 - What would be the sequence of the strand of DNA...Ch. 4 - 8. According to the RNA world model, a ribozyme...Ch. 4 - Prob. 10TYPSSCh. 4 - Prob. 11PIATCh. 4 - Prob. 12PIAT
Knowledge Booster
Learn more about
Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, biology and related others by exploring similar questions and additional content below.Similar questions
- Identify the indicated tissue. (Tilia stem x.s.) parenchyma collenchyma sclerenchyma xylem phloem none of thesearrow_forwardIdentify the indicated structure. (Cucurbita stem l.s.) pit lenticel stomate tendril none of thesearrow_forwardIdentify the specific cell? (Zebrina leaf peel) vessel element sieve element companion cell tracheid guard cell subsidiary cell none of thesearrow_forward
- What type of cells flank the opening on either side? (leaf x.s.) vessel elements sieve elements companion cells tracheids guard cells none of thesearrow_forwardWhat specific cell is indicated. (Cucurbita stem I.s.) vessel element sieve element O companion cell tracheid guard cell none of thesearrow_forwardWhat specific cell is indicated? (Aristolochia stem x.s.) vessel element sieve element ○ companion cell O O O O O tracheid O guard cell none of thesearrow_forward
- Identify the tissue. parenchyma collenchyma sclerenchyma ○ xylem O phloem O none of thesearrow_forwardPlease answer q3arrow_forwardRespond to the following in a minimum of 175 words: How might CRISPR-Cas 9 be used in research or, eventually, therapeutically in patients? What are some potential ethical issues associated with using this technology? Do the advantages of using this technology outweigh the disadvantages (or vice versa)? Explain your position.arrow_forward
- You are studying the effect of directional selection on body height in three populations (graphs a, b, and c below). (a) What is the selection differential? Show your calculation. (2 pts) (b) Which population has the highest narrow sense heritability for height? Explain your answer. (2 pts) (c) If you examined the offspring in the next generation in each population, which population would have the highest mean height? Why? (2 pts) (a) Midoffspring height (average height of offspring) Short Short Short Short (c) Short (b) Short Tall Short Tall Short Short Tall Midparent height (average height of Mean of population = 65 inches Mean of breading parents = 70 inches Mean of population = 65 inches Mean of breading parents = 70 inches Mean of population = 65 inches Mean of breading parents = 70 inchesarrow_forwardP You are studying a population of 100 flowers that has two alleles at a locus for flower color, blue (B) and green (G). There are 15 individuals with the BB genotype, 70 individuals with the BG genotype, and 15 individuals with the GG genotype. (a) What are the allele frequencies of B and G in the starting population? Show your calculations. (2 pts) (b) Is this population in Hardy-Weinberg equilibrium? Show your calculations. (3 pts) 12pt v Paragraph BIU UA AV & VT2V f CO Varrow_forwardIn a natural population of outbreeding plants, the variance of the total number of seeds per plant is 16. From the natural population, 20 plants are taken into the laboratory and developed into separate true-breeding lines by self- fertilization-with selection for high, low, or medium number of seeds-for 10 generations. The average variance in the tenth generation in each of the 20 sets is about equal and averages 5.8 across all the sets. Estimate the broad-sense heritability for seed number in this population. (4 pts) 12pt v Paragraph BIUA V V T² v B ① O wordsarrow_forward
arrow_back_ios
SEE MORE QUESTIONS
arrow_forward_ios
Recommended textbooks for you
Biology: The Dynamic Science (MindTap Course List)BiologyISBN:9781305389892Author:Peter J. Russell, Paul E. Hertz, Beverly McMillanPublisher:Cengage Learning
Human Heredity: Principles and Issues (MindTap Co...BiologyISBN:9781305251052Author:Michael CummingsPublisher:Cengage Learning
Principles Of Radiographic Imaging: An Art And A ...Health & NutritionISBN:9781337711067Author:Richard R. Carlton, Arlene M. Adler, Vesna BalacPublisher:Cengage Learning
Biology: The Dynamic Science (MindTap Course List)
Biology
ISBN:9781305389892
Author:Peter J. Russell, Paul E. Hertz, Beverly McMillan
Publisher:Cengage Learning
Human Heredity: Principles and Issues (MindTap Co...
Biology
ISBN:9781305251052
Author:Michael Cummings
Publisher:Cengage Learning
Principles Of Radiographic Imaging: An Art And A ...
Health & Nutrition
ISBN:9781337711067
Author:Richard R. Carlton, Arlene M. Adler, Vesna Balac
Publisher:Cengage Learning
DNA vs RNA (Updated); Author: Amoeba Sisters;https://www.youtube.com/watch?v=JQByjprj_mA;License: Standard youtube license