1.The term genetics was first coined in 1905 by

2.Externally visible expression of a gene, which is an inherited feature in an individual’ s appearance is called

3.Sudden change in one or more genes or in the number and structure of chromosomes in the progeny that had not existed in the parents is called

  4.Who had conducted hybridization experiments over a period of eight years on the common garden pea plant?

5.The crosses in which two traits were taken into consideration were designated as.

6.Across between two parents representing contrasting forms of a single trait or feature is called

7.In peas, a pure tall plant (TT) is crossed with a short plant(tt). The ratio of pure tall plants to short plants in F2 is

  8.When a pair of alleles is brought together in a hybrid, the members of the allelic pair remain together without mixing and separate or segregate from each other when the hybrid forms gametes. This theory of Mendel is termed as

9.A trait in an organism is influenced by

10.  Which part of the pea flower did Mendel remove to prevent self- pollination in his experimental plant?

11.Diseasessuch as colour blindness and hemophilia are caused by recessive alleles located on the

12.Incase of incomplete dominance the monohybrid ratio of phenotypes in F2generation is

13. Alleles are

14. The9 : 3 : 3 : 1 dihybrid ratio is due to

15. A cross between a tall plant (TT) and short pea plant (tt) resulted in progeny that were all tall plants because

16. A technique in which the genetic constitution of an organism can be altered by introducing new genes or replacing existing genes into its chromosomes is known as

17.Sickle cell anemia, a blood disorder characterized by red blood cells that assume an abnormal, rigid, sickle shape is caused due to

18. Which of the following is not a genetic disease?

19.The genetic constitution of an organism is called

20.Which of the following statements is incorrect?

21.Why do plants need water?

22.The movement of molecules of a substance from a region of their higher concentration to a region of their lower concentration is called

23.The movement of water molecules from a region of their higher concentration to their lower concentration through a semi-permeable membrane is called

24.Looking at the picture choose the factors that help roots to absorb water.

25.The pressure required to completely stop the entry of water into a solution across a semi-permeable membrane is called

26.If the concentration of dissolved solute is more in the surrounding solution than in the cells, then the solution is said to be

27.If the water potential of the soil solution is more negative than the cell sap ofthe root cells, what response do you expect?

28.The process that results in swelling of tissues and rupturing of seed coat for germination of seeds is called

29.Swelling of wooden doors during rainy season is due to

30. Passive absorption of water from the soil by root hair is mainly affected by

31. Which of the following is not an example of passive transport?

32. The passage of salt or ions of a substance from its lower concentration to higher concentration utilizing the energy from the cell through a living membrane is known as

33.When the concentration of soil solutes is low, the absorption of water

34. Synthesis of glucose during photosynthesis causes increase in the........... ……….. pressure of the content of the guard cell

35.What causes shoot to droop down and leaves wilt away?

36. What causes sunflowers to bend towards the Sun?

37. A condition in which the cell contents shrink and the cell loses its turgidity is called

38.Shrinkage or contraction of the cytoplasm (cell content) of a cell from its cell wall when placed in a hypertonic solution is called

39.The water and minerals absorbed by the roots are transported through ………… tissue through ascent of sap.

40. Which of the following statements about ascent of sap is incorrect?