Genetics & Skeletal System MCQ Quiz – Part 2
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This Genetics & Skeletal System MCQ Quiz helps aspirants revise important concepts related to heredity, genes, and the structure and functions of the human skeletal system, which are frequently asked in competitive exams. Regular practice of these MCQs improves conceptual understanding and helps candidates answer biology questions quickly and accurately.
GK Series – Biology – Genetics & skeletal System MCQ Quiz |
|
| Subject | Biology |
| Chapter | Genetics & skeletal System |
| Part | 2 |
| Questions | 25 |
Who Should Attempt This Genetics & skeletal System MCQ Quiz?
This Genetics & Skeletal System MCQ Quiz is useful for aspirants preparing for SSC, Railways, Banking, Defence, and other government job exams, where basic biology questions are commonly asked in the General Knowledge section.
Topics Covered in This Genetics & skeletal System MCQ Quiz
This Genetics & Skeletal System MCQ Quiz is useful for aspirants preparing for SSC, Railways, Banking, Defence, and other government job exams, where basic biology questions are commonly asked in the General Knowledge section.
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Question 1 of 25
1. Question
In F₂ generation, phenotypic ratio is
Correct
➤ F₂ generation shows 3:1 ratio.
➤ 3 dominant : 1 recessive.Incorrect
➤ F₂ generation shows 3:1 ratio.
➤ 3 dominant : 1 recessive. -
Question 2 of 25
2. Question
Genotypic ratio in monohybrid cross is
Correct
➤ Genotypic ratio = 1:2:1 (TT:Tt:tt).
➤ Shows genetic distribution.Incorrect
➤ Genotypic ratio = 1:2:1 (TT:Tt:tt).
➤ Shows genetic distribution. -
Question 3 of 25
3. Question
Which generation shows reappearance of recessive trait?
Correct
➤ Recessive trait appears in F₂ generation.
➤ Due to segregation of alleles.Incorrect
➤ Recessive trait appears in F₂ generation.
➤ Due to segregation of alleles. -
Question 4 of 25
4. Question
Tallness in pea plant is
Correct
➤ Tall (T) is dominant over dwarf (t).
➤ Expressed in F₁ generation.Incorrect
➤ Tall (T) is dominant over dwarf (t).
➤ Expressed in F₁ generation. -
Question 5 of 25
5. Question
Dwarfness in pea plant is
Correct
➤ Dwarf (t) is recessive trait.
➤ Appears only in tt condition.Incorrect
➤ Dwarf (t) is recessive trait.
➤ Appears only in tt condition. -
Question 6 of 25
6. Question
Dihybrid cross involves
Correct
➤ Dihybrid cross studies inheritance of two traits simultaneously.
➤ Example: Seed shape and seed colour.Incorrect
➤ Dihybrid cross studies inheritance of two traits simultaneously.
➤ Example: Seed shape and seed colour. -
Question 7 of 25
7. Question
Example of dihybrid cross is
Correct
➤ Dihybrid cross involves two traits (shape & colour).
➤ Example: Round yellow × wrinkled green.Incorrect
➤ Dihybrid cross involves two traits (shape & colour).
➤ Example: Round yellow × wrinkled green. -
Question 8 of 25
8. Question
In F₁ generation of dihybrid cross, offspring are
Correct
➤ All F₁ offspring show dominant traits.
➤ Recessive traits are hidden.Incorrect
➤ All F₁ offspring show dominant traits.
➤ Recessive traits are hidden. -
Question 9 of 25
9. Question
Phenotypic ratio in F₂ generation of dihybrid cross is
Correct
➤ F₂ generation shows 9:3:3:1 ratio.
➤ It includes four combinations of traits.Incorrect
➤ F₂ generation shows 9:3:3:1 ratio.
➤ It includes four combinations of traits. -
Question 10 of 25
10. Question
Law of Independent Assortment is verified by
Correct
➤ Dihybrid cross proves independent assortment.
➤ Traits are inherited independently.Incorrect
➤ Dihybrid cross proves independent assortment.
➤ Traits are inherited independently. -
Question 11 of 25
11. Question
In dihybrid cross, number of phenotypes in F₂ is
Correct
➤ Four phenotypes appear in F₂ generation.
➤ Due to two traits combination.Incorrect
➤ Four phenotypes appear in F₂ generation.
➤ Due to two traits combination. -
Question 12 of 25
12. Question
Round seed is
Correct
➤ Round seed is dominant over wrinkled.
➤ Represented by R.Incorrect
➤ Round seed is dominant over wrinkled.
➤ Represented by R. -
Question 13 of 25
13. Question
Wrinkled seed is
Correct
➤ Wrinkled seed is recessive trait.
➤ Appears in rr condition.Incorrect
➤ Wrinkled seed is recessive trait.
➤ Appears in rr condition. -
Question 14 of 25
14. Question
Yellow seed colour is
Correct
➤ Yellow colour is dominant over green.
➤ Represented by Y.Incorrect
➤ Yellow colour is dominant over green.
➤ Represented by Y. -
Question 15 of 25
15. Question
Green seed colour is
Correct
➤ Green colour is recessive trait.
➤ Appears in yy condition.Incorrect
➤ Green colour is recessive trait.
➤ Appears in yy condition. -
Question 16 of 25
16. Question
Total number of chromosome pairs in humans is
Correct
➤ Humans have 23 pairs of chromosomes.
➤ Total = 46 chromosomes.Incorrect
➤ Humans have 23 pairs of chromosomes.
➤ Total = 46 chromosomes. -
Question 17 of 25
17. Question
Number of autosome pairs in humans is
Correct
➤ 22 pairs are autosomes.
➤ 1 pair is sex chromosomes.Incorrect
➤ 22 pairs are autosomes.
➤ 1 pair is sex chromosomes. -
Question 18 of 25
18. Question
Number of sex chromosome pairs in humans is
Correct
➤ Only 1 pair of sex chromosomes (XX or XY).
➤ Determines gender.Incorrect
➤ Only 1 pair of sex chromosomes (XX or XY).
➤ Determines gender. -
Question 19 of 25
19. Question
Sex chromosomes in females are
Correct
➤ Females have XX chromosomes.
➤ They produce only X gametes.Incorrect
➤ Females have XX chromosomes.
➤ They produce only X gametes. -
Question 20 of 25
20. Question
Sex chromosomes in males are
Correct
➤ Males have XY chromosomes.
➤ They produce X or Y gametes.Incorrect
➤ Males have XY chromosomes.
➤ They produce X or Y gametes. -
Question 21 of 25
21. Question
Who determines the sex of the child?
Correct
➤ Father determines the sex of the child.
➤ Sperm carries X or Y chromosome.Incorrect
➤ Father determines the sex of the child.
➤ Sperm carries X or Y chromosome. -
Question 22 of 25
22. Question
If sperm carries X chromosome, the child will be
Correct
➤ X sperm + X ovum = XX (female).
➤ Mother always gives X chromosome.Incorrect
➤ X sperm + X ovum = XX (female).
➤ Mother always gives X chromosome. -
Question 23 of 25
23. Question
If sperm carries Y chromosome, the child will be
Correct
➤ Y sperm + X ovum = XY (male).
➤ Determines male child.Incorrect
➤ Y sperm + X ovum = XY (male).
➤ Determines male child. -
Question 24 of 25
24. Question
Turner syndrome is represented by
Correct
➤ Turner syndrome = XO (female).
➤ One X chromosome is missing.Incorrect
➤ Turner syndrome = XO (female).
➤ One X chromosome is missing. -
Question 25 of 25
25. Question
Klinefelter syndrome is represented by
Correct
➤ Klinefelter syndrome = XXY (male).
➤ Extra X chromosome present.Incorrect
➤ Klinefelter syndrome = XXY (male).
➤ Extra X chromosome present.