Samacheer Kalvi EM 12 Bio - Zoology Unit2 Chapter4 MCQs Mock Test

12th Bio - Zoology Mock Test

Chapter 4: Principles of Inheritance and Variation

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

 

1. Haemophilia is more common in males because it is a __________
   1.   Recessive character carried by Y-chromosome
   2.   Dominant character carried by Y-chromosome
   3.   Dominant trait carried by X-chromosome
   4.   Recessive trait carried by X-chromosome
2. ABO blood group in man is controlled by __________
   1.   Multiple alleles
   2.   Lethal genes
   3.   Sex linked genes
   4.   Y-linked genes
3. Three children of a family have blood groups A, AB and B. What could be the geno types of their parents?
   1.   `I^AI^B` and `I^oI^o`
   2.   `I^AI^o` and `I^BI^o`
   3.   `I^BI^B` and `I^AI^A`
   4.   `I^AI^A` and `I^oI^o`
4. Which of the following is not correct?
   1.   Three or more alleles of a trait in the population are called multiple alleles
   2.   A normal gene undergoes mutations to form many alleles
   3.   Multiple alleles map at different loci of a chromosome
   4.   A diploid organism has only two alleles out of many in the population
5. Which of the following phenotypes in the progeny are __________
   1.   A and B only
   2.   A,B and AB only
   3.   AB only
   4.   A,B,AB and O
6. Which of the following phenotypes is not possible in the progeny of the parental genotypic combination `I^AI^O` × `I^AI^B`?
   1.   AB
   2.   O
   3.   A
   4.   B
7. Which of the following is true about Rh factor in the offspring of a parental combination DdxDd (both Rh positive)?
   1.   All will be Rh positive
   2.   Half will be Rh positive
   3.   About 3/4 will be Rh negative
   4.   About one fourth will be Rh negative
8. What can be the blood group of offspring when both parents have AB blood group?
   1.   AB only
   2.   A, B and AB
   3.   A, B, AB and O
   4.   A and B only
9. If the childs blood group is ‘O’ and fathers blood group is ‘A’ and mother’s blood group is ‘B’ the genotype of the parents will be __________
   1.   `I^AI^A` and `I^BI^o`
   2.   `I^AI^o` and `I^BI^o`
   3.   `I^AI^o` and `I^oI^o`
   4.   `I^oI^o` and `I^BI^B`
10. XO type of sex determination and XY type of sex determination are examples of __________
    1.   Male heterogamety
    2.   Female heterogamety
    3.   Male homogamety
    4.   Both (b) and (c)
11. In an accident there is great loss of blood and there is no time to analyse the blood group which blood can be safely transferred?
    1.   ‘O’ and Rh negative
    2.   ‘O’ and Rh positive
    3.   ‘B’ and Rh negative
    4.   ‘AB’ and Rh positive
12. Father of a child is colour blind and mother is carrier for colour blindness, the probability of the child being colour blind is __________
    1.   25%
    2.   50%
    3.   100%
    4.   75%
13. A marriage between a colour blind man and a normal woman produces __________
    1.   All carrier daughters and normal sons
    2.   50% carrier daughters, 50% normal daughters
    3.   50% colour blind sons, 50% normal sons
    4.   All carrier off springs
14. Mangolism is a genetic disorder which is caused by the presence of an extra chromosome number
    1.   20
    2.   21
    3.   4
    4.   23
15. Klinefelters’ syndrome is characterized by a karyotype of __________
    1.   XYY
    2.   XO
    3.   XXX
    4.   XXY
16. Females with Turners’syndrome have __________
    1.   Small uterus
    2.   Rudimentary ovaries
    3.   Underdeveloped breasts
    4.   All of these
17. Pataus’ syndrome is also referred to as __________
    1.   13-Trisomy
    2.   18-Trisormy
    3.   21-Trisormy
    4.   None of these
18. “Universal Donor” and “Universal Recipients” blood group are __________ and __________ respectively
    1.   AB, O
    2.   O, AB
    3.   A, B
    4.   B, A
19. ZW-ZZ system of sex determination occurs in __________
    1.   Fishes
    2.   Reptiles
    3.   Birds
    4.   All of these
20. Co-dominant blood group is __________
    1.   A
    2.   AB
    3.   B
    4.   O
21. Which of the following is incorrect regarding ZW-ZZ type of sex determination?
    1.   It occurs in birds and some reptiles
    2.   Females are homogametic and males are heterogametic
    3.   Male produce two types of gametes
    4.   It occurs in gypsy moth

Samacheer Kalvi EM 12th Std Bio - Zoology Unit 2 Chapter 4 MCQs Mock Test Instructions

Chapter 4: Principles of Inheritance and Variation

Here you will find 21 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 - Zoology if the mock test is taken from Bio - Zoology).
• The Next Chapter Button on the Top and Bottom Navigates to the Next Chapter (Example: From Chapter 4 to Chapter 5 and so on).
• The Prev Chapter Button on the Top and Bottom Navigates to the Prev Chapter (Example: From Chapter 4 to Chapter 3 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.