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प्रश्न
Name the sex chromosomes in human males and females
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उत्तर
Sex chromosomes in human males are X and Y.
Sex chromosomes in human females are XX.
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संबंधित प्रश्न
Correct the following statement if there is any mistake:
If there are 46 chromosomes in a cell, there will be 23 chromatin fibres inside the nucleus during interphase.
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.
The component which is in the nuclei of cells and carries the hereditary characteristics is called ______.
Choose the correct answer:
In an interphase cell chromosome are as _____________
Choose the correct answer:
Minimum coiling in chromosome is at ________________
Choose the correct answer:
Chromosome is most coiled at (in mitosis) ________________
Mention the contribution of the scientist given below in the study of chromosome:
Sutton and Boveri
Choose the correct answer:
The term 'chromosome' was coined by ___________
Choose the correct answer:
Thick short chromosomes can be observed at (in mitosis) ___________
Why gametes have a haploid number of chromosomes?
Explain the Term Chromosomes
Give Technical Terms
The stage at which the formation of chiasmata occurs.
Name the following:
Pairs of chromosomes, present in human egg cells.
Name the following:
A specific part of a chromosome that determine hereditary characteristics.
Write the functional activity of the following structure:
Chromosomes
Give the example of X- monosomy you have studied.
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.
Read the following statements and select the correct option.
Statement I: The densely packed transcriptionally active, light staining region of chromatin is known as 'Heterochromatin'.
Statement II: The loosely packed, dark staining transcriptionally inactive region of chromatin is known as 'Euchromatin'.
Define Aneuploidy.
