MCQs On Chromosomes

Chromosomes are often defined as fragile, thread-like structures found within the nucleus of a cell. These chromosomes are mainly involved in carrying and transporting genetic instructions from one generation to a different generation during the method of reproduction. Other primary functions of chromosomes are cellular division , cell repair, heredity, mutation, variation and also regeneration.

Here are Some solved important MCQs on chromosomes- Structure, types, function  and its disorders.

1.The term chromosome was coined by ___________.

1. Sutton
2. Hoffmeister
3. Boveri
4. Waldeyer

2. Who was the first person to observe the chromosomes?

1. Waldeyer
2. Hofmeister
3. Strasburger
4. Fleming

3.Who proposed the chromosomal theory of inheritance?

1. Sutton
2. Correns
3. Boveri
4. Both (a) and (c)

4. Which of the following statements is true about the ends of the chromosome?

1. The ends of the chromosome are called Satellites
2. The ends of the chromosome are called Telomeres
3. The ends of the chromosome are called Centromeres
4. The ends of the chromosome are called Kinetochore

5. How many sex chromosomes are present in a human being?

1. 1 pair
2. 2 pairs
3. 3 pairs
4. 4 pairs

6. Which of the following statements is true about the metaphase?

1. A chromosome is the thickest during the metaphase
2. A chromosome is the longest during the metaphase
3. A chromosome is the shortest during the metaphase
4. Both (a) and (c)

7. In males, the gene for color blindness is located in________.

1. X-chromosome
2. Y-chromosome
3. Either X-chromosome or Y-chromosome
4. Both X and Y chromosome

8. A fully expressed allele is referred to as ________.

1. Dominant
2. Recessive
3. Homologous
4. Heterozygous

9. During the anaphase stage in a bone marrow cell, each of the chromosomes has_______.

1. No chromatids
2. One chromatid
3. Two chromatids
4. Several chromatids

10. Most of the genetic disorders are caused due to _________.

1. Mutation
2. The gender of an individual
3. The gross chromosomal abnormalities
4. All of the above

11. The thread-like structures, which appear inside the nucleus at the time of cell division, are called __________.

1. Asters
2. Chromosomes
3. Centrioles
4. Spindle fibers

12. Which of the following statements is true about the chromatin composition?

1. DNA
2. DNA and proteins
3. RNA
4. DNA, RNA and proteins

13. How many autosomes are present in a human being?

1. 20 pairs
2. 22 pairs
3. 23 pairs
4. 44 pairs

14. Which of the following living species comprises more than 200 chromosomes?

1. Chicken
2. Buffalo
3. Amoeba
4. Giraffe

15. Which of the following is called the sex-linked disease?

1. Leukemia
2. Alzheimer’s
3. Color blindness
4. Malignancy