Samacheer Kalvi EM 12 Bio - Botany Unit7 Chapter3 MCQs Mock Test

12th Bio - Botany Mock Test

Chapter 3: Chromosomal Basis of Inheritance

Choose the correct answer from the multiple choices, then click "Next" to goto next question and click "OK" after seeing the score.

 

1. An allohexaploidy contains
   1.   Six different genomes
   2.   Six copies of three different genomes
   3.   Two copies of three different genomes
   4.   Six copies of one genome
2. The A and B genes are 10 cM apart on a chromosome. If an AB/ab heterozygote is testcrossed to ab/ab, how many of each progeny class would you expect out of 100 total progeny?
   1.   25 AB, 25 ab, 25 Ab, 25 aB
   2.   10AB, 10ab
   3.   45 AB, 45 ab
   4.   45 AB, 45 ab, 5 Ab, 5aB
3. Match list I with list II
   
   
   1.   A-i, B-iii, C-ii, D-iv
   2.   A-ii, B-iii, C-iv, D-i
   3.   A-ii, B-iii, C-i, D-iv
   4.   A -iii, B-ii, C-i, D-iv
4. Which of the following sentences are correct?
   1. The offspring exhibit only parental combinations due to incomplete linkage
   2. The linked genes exhibit some crossing over in complete linkage
   3. The separation of two linked genes are possible in incomplete linkage
   4. grossing over is absent in complete linkage
   1.   1 and 2
   2.   2 and 3
   3.   3 and 4
   4.   1 and 4
5. Accurate mapping of genes can be done by three point test cross because increases
   1.   Possibility of single cross over
   2.   Possibility of double cross over
   3.   Possibility of multiple cross over
   4.   Possibility of recombination frequency
6. Due to incomplete linkage in maize, the ratio of parental and recombinants are
   1.   50 : 50
   2.   7 : 1 : 1 : 7
   3.   96.4 : 3.6
   4.   1 : 7 : 7 : 1
7. Genes G S L H are located on same chromosome. The recombination percentage is between and G is 15%, S and L is 50% and H and S are 20%. The correct order of genes is
   1.   GHSL
   2.   SHGL
   3.   SGHL
   4.   HSLG
8. The point mutation sequence for transition, transition, transversion and transversion in DNA are
   1.   A to T, T to A, C to G and G to C
   2.   A to G, C to T, C to G and T to A
   3.   C to G, A to G, T to A and G to A
   4.   G to C, A to T, T to A and C to G
9. If haploid number in a cell is 18. The double monosomic and trisomic number will be
   1.   35 and 37
   2.   34 and 37
   3.   37 and 35
   4.   17 and 19
10. Changing the codon AGC to AGA represents
    1.   missense mutation
    2.   nonsense mutation
    3.   frameshift mutation
    4.   deletion mutation
11. Assertion (A): Gamma rays are generally used to induce mutation in wheat varieties.
    Reason (R): Because they carry lower energy to non-ionize electrons from atom
    1.   A is correct. R is correct explanation of A
    2.   A is correct. R is not correct explanation of A
    3.   A is correct. R is wrong explanation of A
    4.   A and R is wrong
12. How many map units separate two alleles A and B, if the recombination frequency is 0.09?
    1.   900 cM
    2.   90 cM
    3.   9 cM
    4.   0.9 cM

Samacheer Kalvi EM 12th Std Bio - Botany Unit 7 Chapter 3 MCQs Mock Test Instructions

Chapter 3: Chromosomal Basis of Inheritance

Here you will find 12 MCQs questions and options. Read the questions carefully and select the appropriate answer for the question by selecting/clicking the box before the option. A pop-up box will open by displaying the result of the option selected. The result of each question will be based on percentages. Each question will have 3 chances to select the right option and for every chance, the percentage of scores will be reduced. Likewise, the remaining questions also take place. The overall percentage scored will be displayed at the completion of the mock test.

Note: Every time the page loads, the question and options will be randomized and takes you to the beginning of the particular exercise.

Button Navigations:

The Below Image shows the button navigations.

• The Home Button On the Top and Bottom Navigates to the Homepage of the Subject (Example: To Bio - Botany if the mock test is taken from Bio - Botany).
• The Next Chapter Button on the Top and Bottom Navigates to the Next Chapter (Example: From Chapter 3 to Chapter 4 and so on).
• The Prev Chapter Button on the Top and Bottom Navigates to the Prev Chapter (Example: From Chapter 3 to Chapter 2 and so on).
• The Next Button next to the question numbers Navigates to the Next Question (Example: From 1 to 2 and so on).
• The Show All Questions Button Displays all the questions and options of that exercise on a single page.
• The Option Box Icon (Box with Question mark icon), is the box that is to be selected for the correct option. By selecting/clicking the option box, a pop-up box will open by displaying the result of the option selected.