The normal body cell of an organism contains 28 pairs of chromosomes. The number of chromosomes present in its germ cell will be:(a) 28 (b) 14 (c) 56 (d) 42
Correct Answer: (a) 28
Explanation:
There are two types of cells in the human body:
(i) Somatic cell or normal body cells (such as cells present in skin, intestinal, etc.) that are not involved in reproduction;
(ii) Germ cell (sperm cell and egg cell) that are involved in reproduction.
Somatic cell or normal body cells contain 28 pair of chromosomes.
Therefore, 28*2 = 56 chromosomes (as one pair is equal to two chromosomes).
Germ cells are haploid in nature therefore they contain only 28 chromosomes (not in pair, but singly).
Related Articles
- The palisade cells of a species of plant contain 28 chromosomes. How many chromosomes will there be in each gamete produced by the plant?(a) 56 (b) 28 (c) 14 (d) 4
- (a) If a normal human cell has 46 chromosomes, how many chromosomes will be there in a human (i) sperm cell, and (ii) zygote?(b) What sizes of plants are produced if both parents have genes Tt?
- Choose the correct statement:(a) Genes are located in the chromosomes(b) The cell is located in the nucleus(c) Chromosomes are located in the nucleolus(d) Cell membrane surrounds the nucleus
- The number of chromosomes in parents and offsprings of a particular species remains constant due to:doubling of chromosomes after zygote formation.halving of chromosomes during gamete formation.doubling of chromosomes after gamete formation.halving of chromosomes after gamete formation.
- In a human, how many chromosomes are present in:(a) a brain cell? (b) a sperm in the testes? (c) an egg which has just been produced by the ovary? (d) a skin cell? (e) a fertilised egg?
- Where are chromosomes found in a cell? State their function.
- The organism containing only a single cell is called(a) unicellular organism(b) multicellular organism(c) organelle(d) all of these
- In tobacco plant, the male gametes have twenty four chromosomes. What is the number of chromosomes in the female gamete? What is the number of chromosomes in the zygote?
- Which of the following is made up of cellulose?(a) Cell wall(b) Chloroplast(c) Cell membrane(d) Golgi body
- In tobacco plant, the male gametes have 24 chromosomes.(i) What is the number of chromosomes in the female gamete? (ii) What is the number of chromosomes in the zygote?
- The atomic number of an element E is 16. The number of electrons in its ion E2– will be :(a) 16 (b) 18(c) 15 (d) 14
- The coloured organelles that are present mainly in plants are(a) chlorophyll(b) plastids(c) WBC(d) chromosomes
- The person A has only B chromosomes in all its gametes. On the other hand, another person C has chromosome D in half of gametes and chromosome E in the other half of gametes. When chromosomes B and D combine during fertilisation, a female zygote results. On the other hand, combination of B and E chromosomes produces a male zygote.(a) What are chromosomes (i) B (ii) D, and (iii) E? (b) Out of B, D and E, which two chromosomes are of the same type? (c) Which chromosome is smaller in size? (d) What is the general name of chromosomes such as B and E? (e) Out of the two persons A and C, which one is (i) male, and (ii) female?
- The vacuole contains(a) Water(b) Cell sap(c) Salts(d) Food
- The area of a triangle with vertices \( A(3,0), B(7,0) \) and \( C(8,4) \) is(A) 14(B) 28(C) 8(D) 6
Kickstart Your Career
Get certified by completing the course
Get Started