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प्रश्न
What would have happened? If.........
Genes had been absent on the chromosomes.
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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.
Write short note on the following :
(a) Golgi apparatus
(b) Mitochondria
Who is odd man among us? Give reason.
Nucleolus, mitochondria, plastids, endoplasmic reticulum
Name the part of the cell concerned with the following :
Liberation of energy
State whether the following statement is true (T) or False (F):
All animal cells contain a cell wall.
State whether the following statement is true (T) or False (F):
Centrosome occurs in animal cells.
State the major function of the following :
Cytoplasm:
Briefly describe the three essential basic parts of a cell
Fill in the blanks:
______ membrane is a selectively permeable membrane.
Identify the cellular structure with the help of the following clue:
It is made up of DNA threads.
