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- 1. It is the creation of an offspring by fusion of haploid gametes, male sperm and female eggs, to form a diploid zygote 2. The creation of offspring without the fusion of egg and sperm 3. The development of a new individual from an unfertilized egg 4. The union of egg and sperm, can be external or internal 5. A common opening between the external environment and the digestive, excretory, and reproductive systems in animals. 6. each individual has both male and female reproductive systems 7. Male gonads which produce sperm and testosterone. 8. Three (3) coiled tubes within each testis in which sperm is produced. 9. Tubular storage sac on top of each testis in which sperm mature. 10. The male gamete consists of head, middle piece, and tail. Released during ejaculation.1. Meiosis is called reduction division. Explain why and where the reduction occurs and how this changes ploidy? (2) 2. A mutation has occured in the DNA segment responsible for the G2/ M Checkpoint. if this mutation occured in a cell that was destined for the production of sperm, would it have any affect on potential offspring? (2) 3. What are the major differences between the events of mitosis and meiosis? (3)1. What is meiosis?2. What specific cells in the body divide through this process?3. Meiosis involves two successive cell divisions. Which of the two is mitotic in nature? Why?4. What particular event in meiosis results to genetic variation? Why?5. Is there a possibility that a problem may occur at any stage of meiosis? If so, what is it and how does itaffect the organism?6. The cells produced after meiosis are haploid, how do these cells restore or maintain the normalchromosome number of the species?7. Why do you think mitosis and meiosis important in the life cycle of an organism?
- 1. Briefly describe follicular development during the human ovarian cycle and how this is coordinated with the uterine cycle. 2. What assumptions are made if the number of CL is used as an indicator of reproductive rate? 3. What do you think would happen to a CL in a species that exhibits diapause (consult your textbook on this)? 4. Where are sperm made (be specific here) and what glands are important for making seminal fluid? 5. Why do the sperm “cork-screw” while swimming? 6. The menstrual cycle provides an example of how endocrine biological clocks regulate reproduction. Can you give TWO other examples?12.Place the following events of the acrosomal reaction in the correct chronological order. (1) The acrosome releases hydrolytic enzymes. (2) Sperm-binding proteins on the membrane bind the sperm. (3) Sperm nucleus enters the egg. (4) Sperm and egg plasma membranes fuse. (5) Sperm contacts the egg's jelly coat (This is a multiple choice question choose the answer from the choices below) A.1,2,4,3,5 B.3,5,2,1,4 C.5,2,4,3,1 D.5,1,2,4,35. Do other organs or organ systems develop at the same time? Are they related to the function of your assigned organ or organ system? 6. A previously infertile couple wishes to have a pregnancy but the man produces non-motile sperm. If it were possible to fertilize one of the woman's eggs by removing a sperm nucleus and injecting it into the egg, could this procedure ever produce viable offspring? Why or why not? dorotondin
- 1. How do humans maintain the normal number of chromosomes across generations?2. What is the relationship between a DNA molecule and a chromosome? 3. Create an artwork (illustration/drawing) that differentiates autosomes and sex chromosomes.4. Research on in vitro fertilization, discuss or identify the importance of in vitro fertilization.11. A) Why do we generally see animals with eggs and sperm for gametes (i.e., why do we have two sexes)? B) Why is the sex ratio usually 1 to 1 (use an ESS argument in your answer)?12.Place the following events of the acrosomal reaction in the correct chronological order.(This is a multiple choice question choose the answer from the choices below) choose the best answer. Thank you! (1) The acrosome releases hydrolytic enzymes. (2) Sperm-binding proteins on the membrane bind the sperm. (3) Sperm nucleus enters the egg. (4) Sperm and egg plasma membranes fuse. (5) Sperm contacts the egg's jelly coat A.1,2,4,3,5 B.3,5,2,1,4 C.5,1,2,4,3
- ..explain why meiosis occurs only in specialized cells (gametes), and that the overall goal of meiosis is to make haploid cells for sexual reproduction • ..outline the sequence of key chromosomal movements and rearrangements during the two meiotic divisions, identifying key similarities and differences between meiosis and mitosis • ..describe the ploidy of a cell before and after meiosis I and meiosis II, and how ploidy changes after separation of sister chromatids and homologous chromosomes4. Some stages in the development of an individual are listed here. A = differentiation of cells into tissues, B = fertilization of egg by sperm, C = organ development, D = mitotic cell division of zygote.. Which sequence represents the correct order of these stages? * O A -B-C-D B-C-A-D O D-B-C-A O B-D-A- cIn vertebrate animals, spermatogenesis and oogenesis differ, in that 1.) Cytokinesis is unequal in oogenesis whereas it i equal in spermatogenesis 2.) spermatogenesis is not completed until after fertilization occurs, but oogenesis is completed by the time a girl is born 3.) Oogenesis produces four haploid cells, whereas spermatogenesis produces only one functional spermatozoon 4.) Oogensis ends at menopause. Whereas spermatogenesis is finished before birth 5.) Oogensis begins at the onset of sexual maturity whereas spermatogenesis happens in embryonic development