Ch. 6.1  Introduction to Meiosis and  Reproductive Systems Chapter 6 pp. 188-190
<ul><li>  Tell me what you already know about   about the birds and the bees… </li></ul><ul><li>Sexual reproduction? </li>...
<ul><li>Chapter 5 Review </li></ul><ul><li>Asexual Reproduction </li></ul><ul><li>Only 1 parent  is required </li></ul><ul...
<ul><li>Sexual Reproduction </li></ul><ul><li>2 parents  are required </li></ul><ul><li>Offspring are genetically differen...
<ul><li>Genetic diversity:  </li></ul><ul><li>Variation, or inherited genetic differences in a species </li></ul><ul><li>S...
<ul><li>Q: How is genetic information passed along from parent to offspring? </li></ul><ul><li>A: In the  chromosomes  the...
<ul><li>Haploid number:  </li></ul><ul><li>each set of inherited chromosomes; half the diploid number (n) </li></ul><ul><l...
<ul><li>Gametes:  specialized cells necessary for reproduction;    produced by  meiosis </li></ul><ul><li>male gametes =  ...
<ul><li>Zygote:  </li></ul><ul><li>the  new diploid cell formed by the process of fertilization ; receives half its chromo...
p. 190
Male and Female Reproductive Systems <ul><li>Gametes are produced in  gonads  (testes or ovaries) </li></ul><ul><li>Male R...
<ul><li>Male Reproductive System </li></ul><ul><li>Testes:  two glands located in the scrotum; produce  sperm  (spermatozo...
<ul><li>Male Reproductive System </li></ul><ul><li>Cowper’s Glands:  secrete alkaline (basic) fluid into semen to help neu...
<ul><li>Female Reproductive System </li></ul>
<ul><li>Female Reproductive System </li></ul><ul><li>Ovaries:  produce eggs (ova) and secrete estrogen and progesterone </...
<ul><li>Female Reproductive System </li></ul><ul><li>Vagina:  birth canal and receptacle for penis during sexual intercour...
<ul><li>Interesting Facts </li></ul><ul><li>Eggs are formed inside the ovaries before birth (about  400,000 ); only about ...
Homework for next class: <ul><li>Complete the Introduction to Meiosis and Reproductive Systems worksheet </li></ul><ul><li...
Works Cited <ul><li>http://thumbsterz.com/?p=534 </li></ul><ul><li>http://www.astraware.com/bzzz/ </li></ul><ul><li>http:/...
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Sci 9 Lesson 3 April 4 - Introduction to Meiosis and Reproductive Systems

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Sci 9 Lesson 3 April 4 - Introduction to Meiosis and Reproductive Systems

  1. 1. Ch. 6.1 Introduction to Meiosis and Reproductive Systems Chapter 6 pp. 188-190
  2. 2. <ul><li> Tell me what you already know about about the birds and the bees… </li></ul><ul><li>Sexual reproduction? </li></ul><ul><li>Eggs? Sperm? </li></ul><ul><li>The human reproductive systems? </li></ul><ul><li>Meiosis? </li></ul>
  3. 3. <ul><li>Chapter 5 Review </li></ul><ul><li>Asexual Reproduction </li></ul><ul><li>Only 1 parent is required </li></ul><ul><li>Offspring are genetically identical to the parent (clones) </li></ul><ul><li>Examples: binary fission, budding, etc. </li></ul>
  4. 4. <ul><li>Sexual Reproduction </li></ul><ul><li>2 parents are required </li></ul><ul><li>Offspring are genetically different from each other, from either parent, and from any other member of their species </li></ul>
  5. 5. <ul><li>Genetic diversity: </li></ul><ul><li>Variation, or inherited genetic differences in a species </li></ul><ul><li>Sexual reproduction randomly sorts , or shuffles, DNA </li></ul><ul><ul><li> leads to genetic diversity </li></ul></ul><ul><li>The combination of genes that an organism receives from its parents may allow it to better cope with changes in the environment </li></ul><ul><li> Genetic diversity gives some organisms a survival advantage over others </li></ul>
  6. 6. <ul><li>Q: How is genetic information passed along from parent to offspring? </li></ul><ul><li>A: In the chromosomes the offspring inherits from its parents. </li></ul><ul><li>Diploid number: two sets of chromosomes (2n) </li></ul><ul><li>Example: Diploid number in a human cell </li></ul><ul><li> (2 x 23 chromosomes) = 46 chromosomes </li></ul><ul><li>2n </li></ul>
  7. 7. <ul><li>Haploid number: </li></ul><ul><li>each set of inherited chromosomes; half the diploid number (n) </li></ul><ul><li>Example: Humans </li></ul>1 set of chromosomes from female parent = 23 (n) 1 set of chromosomes from male parent = 23 (n) 23 23 Sperm Egg
  8. 8. <ul><li>Gametes: specialized cells necessary for reproduction; produced by meiosis </li></ul><ul><li>male gametes = sperm cells </li></ul><ul><li>female gametes = egg cells </li></ul><ul><li>Fertilization: </li></ul><ul><li>the process where an egg cell is </li></ul><ul><li>penetrated by a sperm cell and </li></ul><ul><li>the haploid genetic information </li></ul><ul><li>of both male and female gametes </li></ul><ul><li>combines </li></ul>
  9. 9. <ul><li>Zygote: </li></ul><ul><li>the new diploid cell formed by the process of fertilization ; receives half its chromosomes from its female parent and half its chromosomes from its male parent </li></ul><ul><li>Embryo: the stage of a multicellular organism that develops from a zygote </li></ul>1 set of chromosomes from female parent = 23 (n) 1 set of chromosomes from male parent = 23 (n) 2 sets of chromosomes, 1 from each parent = 46 (2n)
  10. 10. p. 190
  11. 11. Male and Female Reproductive Systems <ul><li>Gametes are produced in gonads (testes or ovaries) </li></ul><ul><li>Male Reproductive System </li></ul>
  12. 12. <ul><li>Male Reproductive System </li></ul><ul><li>Testes: two glands located in the scrotum; produce sperm (spermatozoa) and testosterone (male hormone) </li></ul><ul><li>Scrotum: sac holding both testes </li></ul><ul><li>Epididymis: location of sperm maturation </li></ul><ul><li>Vas deferens: stores and transports sperm </li></ul><ul><li>Seminal vesicles and prostate gland: secrete fluid which mix with sperm to form semen </li></ul>
  13. 13. <ul><li>Male Reproductive System </li></ul><ul><li>Cowper’s Glands: secrete alkaline (basic) fluid into semen to help neutralize the acidity of the urethra </li></ul><ul><li>Urethra: a dual purpose tube that both semen and urine pass through to leave the body </li></ul><ul><li>Penis: the organ of transfer of sperm to female </li></ul>
  14. 14. <ul><li>Female Reproductive System </li></ul>
  15. 15. <ul><li>Female Reproductive System </li></ul><ul><li>Ovaries: produce eggs (ova) and secrete estrogen and progesterone </li></ul><ul><li>Oviducts (aka Fallopian Tubes): tubes which transport eggs to the uterus </li></ul><ul><li>Uterus: location of fetus development during pregnancy </li></ul><ul><li>Endometrium: lining of the uterus; site of implantation and development of the fertilized egg </li></ul><ul><li>Cervix: neck or opening from the uterus to the vagina </li></ul>
  16. 16. <ul><li>Female Reproductive System </li></ul><ul><li>Vagina: birth canal and receptacle for penis during sexual intercourse </li></ul><ul><li>Urethra: opening to the bladder </li></ul><ul><li>Clitoris: a small, pea-shaped bump at the front of the labia that contains erectile tissue (counterpart to male penis.) </li></ul><ul><li>Vulva: term which describes the external female sex organs </li></ul><ul><li>Labia: folds of tissues which cover the vaginal opening </li></ul>
  17. 17. <ul><li>Interesting Facts </li></ul><ul><li>Eggs are formed inside the ovaries before birth (about 400,000 ); only about 400 will ever be released from the ovaries during ovulation </li></ul><ul><li>A healthy man can produce between 10 million to 50 million sperm per day ! </li></ul><ul><li>The average swimming speed of a sperm is 8 inches per hour </li></ul><ul><li>Sperm can only survive inside a woman for 2 to 7 days </li></ul>
  18. 18. Homework for next class: <ul><li>Complete the Introduction to Meiosis and Reproductive Systems worksheet </li></ul><ul><li>Study for your Genetics and Reproductive Systems quiz </li></ul>
  19. 19. Works Cited <ul><li>http://thumbsterz.com/?p=534 </li></ul><ul><li>http://www.astraware.com/bzzz/ </li></ul><ul><li>http://www.lin-wood.org/161010115135732327/blank/browse.asp?A=383&BMDRN=2000&BCOB=0&C=56312 </li></ul><ul><li>http://blog.dialaphone.co.uk/2009/09/16/text-a-question-10-sites-that-answer-questions-via-text/ </li></ul><ul><li>http://hubpages.com/hub/Is-Sex-Necessary-for-Reproduction </li></ul><ul><li>http://missevanson.blogspot.com/ </li></ul><ul><li>http://thunder.biosci.umbc.edu/classes/biol414/spring2007/index.php?title=Genetic_variation&redirect=no </li></ul><ul><li>http://baisically.blogspot.com/ </li></ul><ul><li>http://www.shropshireivf.nhs.uk/about-fertility/reproductive-system.asp </li></ul><ul><li>http://topnews.net.nz/content/22039-sperm-dash-lead-new-male-contraception </li></ul><ul><li>http://theano5.blogspot.com/ </li></ul>

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