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प्रश्न
Give Reason:
The Law of independent assortment holds good for the gene pairs that occur in different pairs of chromosomes.
उत्तर
It is a chromosome and not the individual gene which segregates during gamete formation.
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संबंधित प्रश्न
Name the sex chromosomes in human males and females
The term “chromosomes” literally means ______.
Match the events given in column A with the phase in mitotic cell division in column B.
| Column ‘A’ | Column ‘B’ | ||
| 1. | Chromosomes get arranged in a horizontal plane at the equator. |
a. | Anaphase |
| 2. | Daughter chromosomes move to the opposite poles of a spindle |
b. | Prophase |
| 3. | Chromosomes become visible as fine, long threads. |
c. | Telophase |
| 4. | Chromosomes lose their distinctiveness and gradually become transformed into a chromatin network. |
d. | Metaphase |
Humans have 46 chromosomes. Their sperms and eggs will have ______ chromosomes each.
Choose the correct answer:
Chromosomes number is halved in _____________
Choose the correct answer:
Chromosome is most coiled at (in mitosis) ________________
Enumerate the various changes that occur in the nucleus of the cell during anaphase of mitotic division.
Why gametes have a haploid number of chromosomes?
Identify the stages of meiosven below and label them.
Give Technical Terms
The phase of meiosis at which homologous chromosomes are separated.
Write the functional activity of the following structure:
Spindle fibers
Name the following:
Pairs of chromosomes, present in human egg cells.
With the help of a neat labelled diagram, describe the structure of chromosome.
The sex of the newborn child is a matter of chance and neither of the parents may be considered responsible for it. What would be the possible fusion of gametes to determine the sex of the child?
What' does 'P' and 'Q' represent in the following diagram of X and Y chromosomes? Select the correct option representing, its appropriate description.
Differentiate between X-chromosome and Y-chromosome with reference to –
- length of non-homologous regions
- type as per the position of the centromere
Define Aneuploidy.
The two non-sister chromatids of a paired chromosome are attached to each other at ______ during the process of crossing over.
Rewrite the correct form of the statement by changing the first or last word only:
Duplicated chromosomes remain attached at a point termed as centrosome.
