Name Biology Homework Chapter 6: Continuity Through Reproduction Pages 143-158 Answer the questions with complete thoughts! Per. * Sections 6.1 and 6.2: Reproduction, Read pages 143 to 146 PART A: Define the terms. Life cycle Reproduction Sexual reproduction Asexual reproduction Gametes Regeneration PART B: 1. What is the adaptive advantage (benefit) of internal fertilization compared to external fertilization in sexually reproducing animals? 2. What does the statement, The secret to biological success for a species lies in the populations' ability to reproduce & pass on their genes before they die. mean to you? 3. What might be the biological advantage (benefit) for organisms to reproduce both sexually and asexually (for example potato plants, and Sea Stars can do this)? PART C: 1. Read, study and know pages 143-146. Answer questions 1 through 4 in the CONCEPT REVIEW on page 146. Please number your response, and answer the questions in complete intelligent thoughts. 1
* Sections 6.3 through 6.5: Formation of Reproductive Cells, Read pages 147 to 151 PART A: Define the terms in your own words. Sperm Egg (ova) Zygote Diploid(2n) Haploid(n) Homologous chromosomes Meiosis Crossing over PART B: 1. Compare the number of chromosome of a corn plant, human, and a fruit fly. (see your text for help) 2. If gametes were diploid the resulting zygote would have how many chromosomes? (Give your answer in haploid(n) number. Example 2n, or 3n, or 4n, or 5n, or ) 3. Explain why meiosis is also referred to as reduction division. 4. Name the process that makes haploid gametes. 5. Summarize meiosis using your own words, and by drawing a diagram showing the 2n germline cells undergoing Meiosis I and II to produce four haploid(n) gametes. 2
PART C: Read, study and know pages 147-151. Answer questions 1 through 7 in the CONCEPT REVIEW on page 151. Please number your response, and answer the questions in complete intelligent thoughts. Possible Essays: 1. Explain how meiosis maintains a constant number of chromosomes in the body of cells of organisms that sexually reproduce. For example, humans have a constant chromosome number of 46. How is this so? * Sections 6.6 through 6.8: Human Reproduction, Read pages 152-158 PART A: Define the terms. (Section 1) Uterus Oviduct (fallopian tube) Cervix Vagina Ovulation Tubal ligation 3
Hormones Menopause Menstrual cycle Feedback mechanism (system) (Section 2) Scrotum Testes Epididymis Vas deferens Seminal vesicle Prostate gland Semen Vasectomy Puberty PART B: 1. What is the hypothalamus (what does it do) and where is it? 2. What is the pituitary gland (what does it do) and where is it? 3. What does STD stand for? 4. What are the two major categories (types of organisms) of STD s? 4
5. Indicate which of the following STD s are curable and which are treatable/reduced symptoms. Place them in the proper category. Gonorrhea, HIV, Chlamydia, Syphilis, Genital Warts, and Herpes I & II Curable Treatable 6. Contrast the terms: Curable STD, and Treatable STD. PART C: Read, study and know pages 152-157. Answer questions 2 through 5 in the CONCEPT REVIEW on page 157. Please number your response, and answer the questions in complete intelligent thoughts. Possible Essays: 1. Be able to analyze a STD Case Study (see lab activity) 2. Julio is diagnosed as infected with gonorrhea and chlamydia. What are some possible symptoms, and a diagnosis? What clinical name is given to the general class of reproductive system infections and why is it critical to inform his partners of his infection? 3. Based on your knowledge of male reproductive anatomy, explain whether or not a vasectomy greatly diminishes the volume of the ejaculate, and sex drive (labido). 5
HUMAN REPRODUCTIVE ANATOMY REVIEW Male Anatomy: Using the side view, track with a colored pencil the movement of sperm from the moment it is formed to the time it is released to the time it encounters the ovum. Female Anatomy: Using the front view, track with the same colored pencil the movement of sperm from the moment it enters the female s body to the time it encounters the ovum. Put an X to mark the conception location. 6