During which stage can the chromosomes be seen clearly? Write the features of the eukaryotic and prokaryotic chromosomes.
During which stage can the chromosomes be seen clearly? Write the features of the eukaryotic and prokaryotic chromosomes.
Chromosomes are distinctly visible during the Metaphase stage of mitosis of a cell.
The features of eukaryotic and prokaryotic chromosomes are as follows
Eukaryotic chromosomes
1. They are present in large numbers.
2. In higher organisms it occurs in paired condition.
3. They are visible distinctly only during the metaphase stage of mitosis
4. Each chromosome consists of two chromatics attached together by a centromere.
Prokaryotic chromosomes
1. They are simple in composition when compared to the eukaryotic chromosomes.
2. They are generally circular in shape.
3. There is only one chromosome in a cell.
-
Define ‘natural selection’. (b) “Only variations that confer an advantage to an individual organism will survive in a population”. Do you agree with this statement? Give reason for your answer.
4 years ago
-
Define ‘speciation’. Explain how speciation occurs. (b) Will geographical isolation be a major factor in the speciation of a self-pollinating plant species? Give reason for your answer.
4 years ago
-
(a) Explain the terms ‘analogous organs’ and ‘homologous organs’ with examples. (b) In what way are analogous organs evidence for evolution?
4 years ago
-
What do you understand by the term ‘evolution’? State Darwin’s theory of evolution.
4 years ago
-
Name the scientist who gave the theory of origin of life on earth. What is this theory? (b) How are those species which are now ‘extinct’ studied?
4 years ago
Currently viewing this topic 1 guest.
- 321 Forums
- 27.3 K Topics
- 53.8 K Posts
- 192 Online
- 12.4 K Members