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प्रश्न
Name the type of cell division involved in the production of sperms by honey bees.
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उत्तर
The sperms in honey bee are produced by mitosis.
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
A male honeybee has 16 chromosomes whereas its female has 32 chromosomes. Give one reason.
Who had proposed the chromosomal theory of inheritance?
Classify the chromosomes on the basis of position of centromere.
Describe the structure of sex-chromosomes.
Define the Homologous chromosomes
Changing the codon AGC to AGA represents
When two different genes came from the same parent they tend to remain together.
Write the observed phenotypic ratio.
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 |
During cell division, spindle fibres get attached to the disc shaped structures present on the centromere are known as ______.
From the following identify the INCORRECT statement/s with respect to the chromosomes.
i. Chromosomes are capable of self replication and play vital role in heredity, mutation, variation, and evolutionary development of eukaryotic species.
ii. Chromosomes are visible during cell division.
iii. Chemically eukaryotic chromosomes are made of mRNA, histone and non-histone proteins.
iv. The number of chromosomes varies within the population of a particular species.
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.
Chromosomal theory of inheritance was put forth by ______
Chromosomal theory of inheritance was given by ______.
Chromosome maps/genetic maps were first prepared by ______.
There was a mix-up at the hospital after a fire accident in the nursery division. Which of these children belong to the parents?
How do genes and chromosomes share similarity from the point of view of genetical studies?
A haemophilic man marries a carrier woman and they have a daughter. What is the probability of their daughter being haemophilic?
In a karyotype analysis, X and Y chromosomes represent sex chromosomes.
Name the scientist who discovered the X chromosome.
