Tiêu đề 05. PRINCIPLES OF INHERITANCE AND VARIATION.pdf ✅

05. PRINCIPLES OF INHERITANCE AND VARIATION 1. Mendal has choes.... P.... for his experiments. He selected.....Q... true breeding purelines. (a) P-Sweet Pea,Q-14 (b) P-Sweet Pea,Q-7 (c) P-Garden Pea,Q-14 (b) P-Garden Pea,Q-7 2. A true breeding prueline chosen by mendel shows............. Trait inheritance and is obtained by continuous ..... pollination for ............ generations. (a) Stable, cross, many (b) Unstable, self, many (c) Stable, cross, few (b) Stable, self, many 3. Four figures are shown below. Select the incorrect match. (a) P Male Drosophila XY sex chromosome (b ) Q Female Drosophila XY sex chromosome (c) R Constrict pea pod Dominant trait (d ) S 2 pairs of homologous chromosomes G2 phase 4. Observe the given crosses (A and B) done in Drosophila. Select the incorrect statement. (a) y and w are more linked than w and m (b) Recombinants will b more in number in cross A than cross B (c) In cross A, parental type will be more than the combinants (d) In cross B, parental type will be more than recombinants 5. Read the following statements and answer the question following it: (A) Inheritance is the basis of heredity. (B) Round shape of seed is a dominant trait. (C) Mendel’s work published in 1855. (D) Chromosomal theory of Inheritance was given by Sutton and Bovert. How many of the above statements are correct ? (a) A, B, C, E (b) B, C, D, E (c) A, B, D (d) All of these 6. GregorMendal worked on ..;.. 1 for .... 2..... years to extract the laws of Inheritance. (a) 1 = Garden pea, 2 = 3 (b) 1 = Garden pea, 2= 7 (c) 1 = Sweet pea, 2 = 5 (d) 1= Sweet pea, 2 = 8 7. Which of the following is a recessive trait selected by Mendal in garden peas?
(a) Green seed colour (b) Axial flower position (c) Green pod colour (d) Both (a) and (c) 8.In garden peas, Mendal has chosen ................. podcolour as dominant and ......... as recessive. (a) Violet, White (b) Green, Violet (c) Yellow, Green (c) Green, Yellow 9. Select the correct statement regarding given figures (A and B). (a) A can be observed during meiosis -I (b) Can be observed during meiosis -II (b) B can be observed during Meiosis-I (c) B can be observed during G-phase 10. Given arrangement of homologous chromosomes can be observed in: (a) stage (b) stage (c) Meiosis-II (d) Germ cell 11. Observe the diagrams given below and identify the wrongly matched option. (a) phase (b) B-Gamete (germ cell) (c) C-Meiosis-II (d) D- phase 12. Among the following select the dominant trait chosen by Mendal? (a) Seed colour-Green (b) Pod colour- Yellow (c) Both (a) and (b) (d) None of these 13. Identify the traits (A-D) chosen by Mendal: Characters in pod (Chosen by Mendal) Dominant Recessive 1- colour A B 2- Shape C D A B C D ( a ) Green Yellow Inflated Constricte d ( b ) Yello w Green Inflated Constricte d ( c ) Green Yellow Constrict ed Inflated ( d ) Yello w Green Constrict ed Inflated 14. ---A---pod shape was dominant over ... B... in Mendel’s experiments. (a) A-Round, B-Wrinkled (b) A-Wrinkled , B- Round (c) A- Inflated, B-Constricted (d) A-Constricted, B- Inflated G1 G2 A G 1 G2
15. All of the following contributed to Mendel’s success except: (a) Mendel’s selection of pea plant for experiments (b) Application of mathematical knowledge (c) Working on small sampling size at a time (d) A-Constricted, B-Inflated 16. How many of the followinig are dominant traits chose by Mendel in hybridization experiments in garden peas? (1) Violet seed colour (2) Constricted pod shape (3) Green seed colour (4) Wrinkled seed shape (5) Yellow pod colour(6) Terminal flower position (a) 1 (b) 2 (c) 3 (d) 4 17. Heterozygous tall pea plant is crossed with a dwarf pea plant. This is (a) Dihybrid corss (b) Test cross (c) Co-dominance (d) Multiple allelism 18. Garden pea plantw as taken. Character - Pod colour Dominant allele-G (for Green colour), Recessice allele-g (for yellow colour). Pureline green pod wad crossed with pureline yellow pod to obtaion progeny. progeny was obtained by selfing of progeny. What will be the ratio of yellow : green pod plants in progeny? (a) 2:1 (b) 1:2 (c) 1:3 (d) 3:1 19. Mendal crossed 2 true breeding pea lines for contrasting pod colour. progeny shows all pea plants with ..... pod colour. (a) Violet (b) Green (c) White (d) Yellow 20. When pure line tall pea plants were crossed with dwarf pea plants progeny was obtained which wall all tall. Why dwarf were not observed in progeny? (a) Allele for dwarfness was blended with alliele for tallness (b) Allele for dwarfeness has not enterned the gamete (c) Allele for dwarfness is a recessive allele (d) Allele for dwarfness shows incomplete dominance 21. Mendal crossed TT xtt. Which of the following is incorrect? (a) progeny were all tall (b) progeny were all parental type (c) In progeny, blending has not occurred (d) 50% intermediate phenotypes were observed in progeny. 22. According to ‘law of dominance’ by Mendel, if in a gene with heterozygous condition, a normal allele produces a normal enzyme then another allele (modified allele) should produce: (a) Normal enzyme (b) Non functional enzyme (c) Less efficient enzyme (d) Both (b) and (c) 23. On his work on monohybrid cross, Mendal succeeded to extract: (a) 1 law (b) 2 laws (c) 3 laws (d) 4 laws F1 F2 F1 F2 F1 F1 1 F F1 F2 F1 F2
24. If the result of test cross is 1:1 what does it indicate? (a) Ther dwarf plant taken was homozygous dwarf (b) The dwarf plant taken was heterozygous (c) The tall plant taken was homozygous tall (d) The tall plant taken was heterozyous tall 25. In a monohybrid cross, law of segregation is proved by the presence of : (a) All tall plants in progeny (b) 3/4 tall plants in progeny (c) 1/4 dwarf plants in progeny (d) All parallel type in progeny 26. If progeny completey resembles either of the parental type, it is case of : (a) Normal monohybrid cross (b) Incomplete dominance (c) Co-dominance (d) Blending inheritance 27. In which of the following cases, progeny does not resemble any of the parental type: (a) Dominance- recessive relationship (b) Pleiotropy (c) Co-domonance (d) Incomplete dominance 28. Mendal has chosen two traits for pod shape as given in diagrams as A and B. select the option with correct identification of trait and its nature. (a) A is representing full pod and is a recessive trait (b) B is repressing full pod and is a recessive trait (c) A is representing constricted pod and is a dominant trait (d) B is representing constricted pod and is recessive trait 29. Two set of traits of garden pea are shown in the diagram. Identify the dominant pair of traits. (a) A and C (b) B and D (c) A and D (d) B and C 30. Section of flower of garden pea is shown in diagram with labellings (P-S). Removal of which part will result in emasculation? (a) P (b) Q (c) R (d) S 31. In the given diagram a technique is being shown. Identify if. (a) Emasculation (b) Artificial pollination (c) Vernalization (d) Etiolation 32. How many of the following statements are correct? F1 F2 F2 F1 F1 F1