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प्रश्न
Name the following:
A specific part of a chromosome that determine hereditary characteristics.
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उत्तर
Gene
APPEARS IN
संबंधित प्रश्न
Chromosomes get aligned at the centre of the cell during:
A. Metaphase
B. Anaphase
C. Prophase
D. Telophase
Choose the ODD one out from the following terms given and name the CATEGORY to which the others belong
Centrosome.Cell wall, Cell membrane, Large vacuoles
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 |
Chromosomes are mainly made up of ______.
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 ___________
Differentiate between
Gametic meiosis and Zygotic meiosis.
Draw a duplicate chromosome and label its part.
Duplicated chromosomes are joined at a point termed ______.
Write the functional activity of the following structure:
Spindle fibers
Name the following:
Cells having a single set of chromosomes.
In humans, the sex chromosome complement is
Explain the structure of chromosomes with labelled diagram.
The loss of one or more chromosomes in ploidy is called ______.
An inheritable change in the amount or the structure of a gene or a chromosome is called ______.
Match the following.
| 1. Autosomes | - | Trisomy 21 |
| 2. Diploid condition | - | 9 : 3 : 3 : 1 |
| 3. Allosome | - | 22 pair of chromosome |
| 4. Down’s syndrome | - | 2n |
| 5. Dihybrid ratio | - | 23rd pair of chromosome |
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'.
In higher unisexual animals, one pair of chromosomes is not identical in two sexes. It is called as ______.
Which of the following is TRUE with respect to the genes which inherit together during crossing over?
After a mitotic cell division, a human female cell will have ______.
