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प्रश्न
Distinguish between the following pair:
Karyotype and Karyokinesis
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उत्तर
The term karyotype refers to the group of characteristics that identify a particular set of chromosomes. Karyokinesis refers to the division of the nucleus.
संबंधित प्रश्न
Synthesis phase in the cell cycle is called so, because of the synthesis of more:
A. RNA
B. RNA and proteins
C. DNA
D. Glucose
Name the sex chromosomes in human males and females
What are genes?
Given below is a schematic diagram of a portion of DNA.
- How many strands are shown in the diagram?
- How many nucleotides have been shown in each strand?
- Name the parts numbered 1, 2, 3, 4 and 5 respectively.
- Name the DNA unit constituted by the parts 1, 2, 3 collectively.
Write a sentence of the following:
Sheath
Choose the correct answer:
Thick short chromosomes can be observed at (in mitosis) ___________
Choose the correct answer:
Sex of an individual is determined by ____________
State how does meiosis maintains chromosome number in a species.
Give a reason for the following:
Gametes must be produced by meiosis for sexual reproduction.
(i) Draw a neat labeled diagram to show the metaphase stage of mitosis in an animal cell having ‘6’ chromosome.
(ii) How many daughter cells are formed at the end of mitosis and at the end of meiosis?
(iii) With reference to cell division explain the following terms:
(Chromatid, Centromere, Haploid).
(iv) Name the type of cell division that occurs during:
1. Growth of shoot 2. Formation of pollen grains.
3. Repair of worn out tissues.
Explain the Term Zygotene
Multiple Choice Question:
How many chromosomes are found in a cell of humans?
Complete the following sentence with appropriate word:
The chromosomal theory of inheritance was proposed by ____________in 1902.
Long answer type question.
Describe the different types of chromosomes.
Nullisomy is represented by ______.
Explain the structure of a chromosome.
Identify the TRUE statements with respect to aneuploidy.
- When the chromosome number is not the exact multiple of the haploid set, it is described as aneuploidy.
- Aneuploidy is only addition of one or more chromosome(s) to the total number of chromosomes in a cell.
- Aneuploidy is further classified as hypoploidy and hyperploidy.
In higher unisexual animals, one pair of chromosomes is not identical in two sexes. It is called as ______.
A male gorilla has 48 chromosomes in each of its body cells. How many chromosomes will each of the sperms have?
