SCIENCE Organism Reproduction and Heredity important questions

 Organism Reproduction

  1.  The Cessation of menstrual cycle in human female is known  as  OVULATION/ MATURATION
  2. The reproductive life of a woman last from  a) menarche to menopause b) menopause to menarche
  3.  Lower narrow end of uterus is called ——– (urethra/ cervix)
  4. Other than spirogyra fermentation also occur in  amoeba/Planaria.
  5. Which cell is formed as the product of ferritization  embryo/zygote.
  6. i)Give an example of flowers having both stamens and carpels (Mustard ,Hibiscus or china rose) ii) What is DNA and parthenogenesis ? iii) What an example of organism  having binary fission  and multiple fission. ?iv) Name two examples where budding takes place ?  v) Give three examples of organism having a)spore formation. b)budding
  7. Name three methods by which plant reproduces by stems ?  What is the functions of sepals and petals ? . Give the name to scientific terms a)the mechanism by which the variation are created and inherited  b)the development of new type of organism.
  8. Where the male gametes and female gametes of flower are produced.
  9. Name two STD’s.  Name the causative organism of AIDS  (expanded form)How can it be prevented?. Write the advantages of vegetative propagation. Name the male and female gonads  where sex hormones  are produced. Name the male and female gametes. Where is embryo sac present in flower? Among Jasmine, Wheat Mustard , Banana which of them reproduce by vegetative propagation?
  10.  What happens when Vas Deferens gets blocked  in male or fallopian tube in female. Name the two type of opening  of female reproductive system.? What is the function of DNA where are found? what happens when a mature Spirogyra filament attains considerable length? Planaria gets cut into two pieces?
  11. What other name is given to bisexual organism.
  12.  What is pollination?  Name the agents of cross pollination .Name the parts of stamen.
  13. List two methods i) male ii) female of contraceptive . Explain how organism create an exact copy of themselves.
  14. With the help of diagram  show different stages of binary fission of amoeba.? Type of reproduction in Hydra, Planaria ,Malarial parasite ,Potato. ,earthworm ,frog ,Rhizopus ,Plasmodium
  15. Write the function of secretions of prostate gland and seminal vesicles in human.
  16. Variations are important for the survival of species overtime. .Why is DNA copying necessary during reproduction ? give main function of human testes. What are  the role of sex hormones ? what is placenta and it’s role during pregnancy.
  17. Draw  a label diagram of male reproductive and female reproductive system. Draw the diagram of anther, style and ovary in the flower ?
  18. How does the process of  seed germination takes place in plants describe  with help of figure
  19. Explain with figure a) Regeneration b) Rhizopus multiply the spore formation c)multiple fission of plasmodium d) Fragmentation e)budding

Heredity and Evolution

  1.  How do the traits get expressed ?List the two difference between acquired traits and inherited traits  with example.? Write difference between dominant and recessive traits.
  2. If the sperm bearing Y chromosome the fertilizes the egg ,the child is like his father Why it is so ?
  3. Why are the chances of variation more in sexually developing organism ?  How can changes in genes can be brought about the change in DNA ?What are the rules of inheritance? What is sex chromosomes  and autosomes ? How many chromosomes are present in human being ?
  4. Draw a flow chart to determine the characteristics of the progeny of a cross between tall pea plants with short  pea plants  with F1 and F2 generation.
  5.  With the help pf X and Y slow the sex determination in human being.? Mention of characteristics of genes.
  6.  The genotype of green stemmed  tomato plants is denoted as GG and that of purple stemmed tomato is gg .when the crossed i)what colour of stem would you expect in F1 progeny ii) what is the percentage of purple stemmed in F2 progeny if F1 plants are self pollinated? iii) what is the ratio ?
  7. If a pure tall pea plant is crossed with a pure dwarf plant then in the first generations only tall plant appears  what happens to the traits of dwarf plant? In the second generation the dwarf traits reappears why?
  8.  Mendel selected garden pea plants for his experiments  , Why? Name the dominant and recessive characters in pea plant taken by Mendel ? Name the first Indian who was aware of  concept of genetics ? (Charaka was the first Indian medical practitioner who knew the factors which determine the sex of child)
  9. In one of the experiments with pea plants Mendal observed that when a pure tall pea plant is crossed with pure dwarf pea plant in the first generation F1only tall plants appear a) what happens to the traits of the dwarf plants in the case? When F1 generation plants are self fertilized ,he observed that a plant of second generation F2 both  tall and dwarf plants are present  why it happens explain .
  10. What is the source of hereditary information in the cell.?
  11.  What do you mean by mutation?
  12. In the monohybrid cross a round seeded plant was crossed with a wrinkle seeded plant. In  F2 generation genotype ratio 1:2:1 how many plants has homozygous round .?
  13. Exchange of genetic material takes place in   sexual/asexual reproduction.
  14.  Two pink coloured flowers on crossing resulted in  1 red,2 pink 1 white flowers progeny than the nature of cross will be self pollination/cross fertilization.
  15. Human males all the chromosomes are paired  except one this unpaired chromosomes may be ______–. Male is determine by _____ chromosomes and female is determined by ______–.
  16. Two pea plants one with round green seeds(RRyy) and other with wrinkled yellow      (rr YY) seeds produce F1 progeny .When F1 is  crossed  F2 progeny will have new combination .   write  F2 be combination.

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