Concept explainers
Introduction:
In animals the sexual life cycle involves meiosis. Meiosis involves two consecutive cell divisions called meiosis I and meiosis II. In meiosis I and II, the stages are prophase I and II, metaphase Iand II, anaphase Iand II and telophase Iand II.
![Check Mark](/static/check-mark.png)
Answer to Problem 8STP
Correct answer :
The correct answer is option B. anaphase II
Explanation of Solution
Explanation/justification for the correct answer:
OptionB. anaphase II- This is the third stage in meiosis II. In this phase the centromeres split and sister chromatids separate and move to opposite poles. Hence, this is the correct option.
Explanation for incorrect answer:
Option A. anaphase I- During this process the homologous chromosomes separate and move to opposite poles of the cell. Hence, this is not the correct option.
Option C. telophase I- In this phase the spindles break down and the chromosomes uncoil and form two nuclei. The cell divides to form two daughter cells.Hence, this is not the correct option.
Option D. telophase II- In this phase the spindle breaks down and four nuclei forms around chromosomes. Cells divide and form four daughter cells. Hence, this is not the correct option.
Chapter 10 Solutions
EP BIOLOGY 2012-STUDENTWORKS ONLINE
Additional Science Textbook Solutions
Biology: Life on Earth (11th Edition)
Cosmic Perspective Fundamentals
Anatomy & Physiology (6th Edition)
Human Physiology: An Integrated Approach (8th Edition)
Introductory Chemistry (6th Edition)
Campbell Biology in Focus (2nd Edition)
- Please 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_forwardYou 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_forward
- P 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_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 BI DI T² v ✓ B°arrow_forward
- Question 1 In a population of Jackalopes (pictured below), horn length will vary between 0.5 and 2 feet, with the mean length somewhere around 1.05 feet. You pick Jackalopes that have horn lengths around 1.75 feet to breed as this appears to be the optimal length for battling other Jackalopes for food. After a round of breeding, you measure the offsprings' mean horn length is 1.67. What is the heritability of horns length (h2)? Is Jackalope horn length a heritable trait? (4 pts)? 12pt v Paragraph BIU A ✓arrow_forwardFrequency of allele A1 Question 2 The graph below shows results of two simulations, both depicting the rise in frequency of beneficial allele in a population of infinite size. The selection coefficient and the starting frequency are the same, but in one simulation the beneficial allele is dominant and in the other it is recessive. Neither allele is fixed by 500 generations. 1.0 1 0.8 0.6 0.4 2 0.2 0 0 100 200 300 400 500 Generation (a) Which simulation shows results for a dominant and which shows results for a recessive allele? How can you tell? (4 pts) (b) Neither of the alleles reaches fixation by 500 generations. If given enough time, will both of these alleles reach fixation in the population? Why or why not? (3 pts) 12pt Paragraph BIU AT2v Varrow_forwardQuestion 14 The relative fitnesses of three genotypes are WA/A= 1.0, WA/a = 0.7, and Wa/a = 0.3. If the population starts at the allele frequency p = 0.5, what is the value of p in the next generation? (3 pts) 12pt v V Paragraph B I U D V T² v V V p O words <arrow_forward
- According to a recent study, 1 out of 50,000 people will be diagnosed with cystic fibrosis. Cystic fibrosis can be caused by a mutant form of the CFTR gene (dominant gene symbol is F and mutant is f). A. Using the rate of incidence above, what is the frequency of carriers of the cystic fibrosis allele for CFTR in the US? (3 pts) B. In a clinical study, 400 people from the population mentioned in (A.) were genotyped for BRCA1 Listed below are the results. Are these results in Hardy- Weinberg equilibrium? Use Chi Square to show whether or not they are. (3 pts) BRCA1 genotype # of women 390 BB Bb bb 10 0 12pt Paragraph L BIUAV V T² v Varrow_forwardOutline a method for using apomixis to maintain feminized CannabisAssume apomixis is controlled by a single dominant gene. You can choose the type of apomixis: obligate or facultative, gametophytic or sporophytic. Discuss advantages and disadvantages of your proposed method.arrow_forwardKinetics: One-Compartment First-Order Absorption 1. In vivo testing provides valuable insight into a drug’s kinetics. Assessing drug kinetics following multiple routes of administration provides greater insight than a single route of administration alone. The following data was collected in 250-g rats following bolus IV, oral (PO), and intraperitoneal (ip) administration. Using this data and set of graphs, determine:(calculate for each variable) (a) k, C0, V, and AUC* for the bolus iv data (b) k, ka, B1, and AUC* for the po data c) k, ka, B1, and AUC* for the ip data (d) relative bioavailability for po vs ip, Fpo/Fip (e)absolute ip bioavailability, Fip (f) absolute po bioavailability, Fpoarrow_forward
- Human Anatomy & Physiology (11th Edition)BiologyISBN:9780134580999Author:Elaine N. Marieb, Katja N. HoehnPublisher:PEARSONBiology 2eBiologyISBN:9781947172517Author:Matthew Douglas, Jung Choi, Mary Ann ClarkPublisher:OpenStaxAnatomy & PhysiologyBiologyISBN:9781259398629Author:McKinley, Michael P., O'loughlin, Valerie Dean, Bidle, Theresa StouterPublisher:Mcgraw Hill Education,
- Molecular Biology of the Cell (Sixth Edition)BiologyISBN:9780815344322Author:Bruce Alberts, Alexander D. Johnson, Julian Lewis, David Morgan, Martin Raff, Keith Roberts, Peter WalterPublisher:W. W. Norton & CompanyLaboratory Manual For Human Anatomy & PhysiologyBiologyISBN:9781260159363Author:Martin, Terry R., Prentice-craver, CynthiaPublisher:McGraw-Hill Publishing Co.Inquiry Into Life (16th Edition)BiologyISBN:9781260231700Author:Sylvia S. Mader, Michael WindelspechtPublisher:McGraw Hill Education
![Text book image](https://www.bartleby.com/isbn_cover_images/9780134580999/9780134580999_smallCoverImage.gif)
![Text book image](https://www.bartleby.com/isbn_cover_images/9781947172517/9781947172517_coverImage_Textbooks.gif)
![Text book image](https://www.bartleby.com/isbn_cover_images/9781259398629/9781259398629_smallCoverImage.gif)
![Text book image](https://www.bartleby.com/isbn_cover_images/9780815344322/9780815344322_smallCoverImage.gif)
![Text book image](https://www.bartleby.com/isbn_cover_images/9781260159363/9781260159363_smallCoverImage.gif)
![Text book image](https://www.bartleby.com/isbn_cover_images/9781260231700/9781260231700_smallCoverImage.gif)