Advertisements
Advertisements
प्रश्न
In a karyotype analysis, X and Y chromosomes represent sex chromosomes.
Name the scientist who discovered the X chromosome.
Advertisements
उत्तर
The German biologist Hermann Henking discovered the X chromosome.
APPEARS IN
संबंधित प्रश्न
If the number of chromosomes in an endosperm cell is 27, what will be the chromosome number in the definitive nucleus?
- 9
- 18
- 27
- 36
Sketch and label the structure of chromosome.
Distinguish between X andY chromosomes. (Mention any 'two' points.)
Classify the chromosomes on the basis of position of centromere.
Answer the following question.
Compare in any three ways the chromosomal theory of inheritance as proposed by Sutton and Bovery with that of experimental results on pea plant presented by Mendel.
Match the column I (Type of chromosome) with column II (name of chromosome).
| Type of chromosome | Name of chromosome | ||
| i. |  |
P. | Acrocentric |
| ii. |  |
Q. | Telocentric |
| iii. |  |
R. | Metacentric |
| iv. |  |
S. | Sub-metacentric |
Identify the term that represents the degree of repetition of the primary basic number of chromosomes in a cell.
From the following identify the statements that are CORRECT with respect to homologous and non-homologous region of X and Y chromosomes.
i. Non-homologous region of X chromosome is longer and contains more genes than that of non-homologous region of Y chromosome.
ii. X-linked genes are present on nonhomologous region of X-chromosome.
iii. Y-linked genes are present on homologous region of Y-chromosome.
iv. Crossing over occurs only between homologous regions of X and Y chromosomes.
A couple has two daughters. What is the probability that the third child will also be a female?
According to the Chromosomal Theory of Inheritance, what is the source of one chromosome in each homologous pair of diploid organisms?
