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प्रश्न
What would have happened? If.........
Genes had been absent on the chromosomes.
उत्तर
On chromosomes, genes are regarded as functional segments. The structural and operational unit of heredity is the gene. If genes are missing from the chromosomes, the offspring will not resemble the parent. Since the gene is the genetic unit that transmits the traits from one parent to the next, the absence of genes will prevent the baby from resembling its parents. It resides in a nucleus and is composed of DNA.
संबंधित प्रश्न
Complete the crossword with the help of clues given below.
Across
1. This is necessary for photosynthesis.
3. Term for component present in the cytoplasm.
6. The living substance in the cell.
8. Units of inheritance present on the chromosomes.
Down
1. Green plastids.
2. Formed by collection of tissues.
4. It separates the contents of the cell from the surrounding medium.
5. Empty structure in the cytoplasm.
7. A group of cells.
Who am I?
I am chemical factory of the cell.
State whether the following statement is true (T) or False (F):
Centrosome occurs in animal cells.
Match the item in column 'A' with those in column 'B'.
| Column A | Column B |
| (a) Vacuoles | (i) Intracellular digestion |
| (b) Nucleolus | (ii) Respiratory enzymes |
| (c) Lysosomes | (iii) Covered by tonoplast |
| (d) Anthocyanin | (iv) Dissolved in the cytoplasm |
| (e) Cristae | (v) Forms RNA |
Briefly discuss the importance of chromosomes to an organism
Write true or false for each statement. Rewrite the false statements correctly:
At the time of cell division the chromatin network changes into small thread-like structures called genes
Give one main function of the following:
Chromosomes
A typical cell consists of ______ major parts.
Identify the cellular structure with the help of the following clue:
It consists of cisternae, vesicles and vacuoles.
Identify the cellular structure with the help of the following clue:
It destroys foreign substances.
