Advertisements
Advertisements
Question
How many chromosomes do drones of honey bees possess?
Advertisements
Solution
Drones of honey bee possess 16 chromosomes.
APPEARS IN
RELATED QUESTIONS
If centromere is situated in the middle of the chromosome, it is called ________.
(a) Metacentric
(b) Acrocentric
(c) Submetacentric
(d) Telocentric
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
Briefly mention the contribution of T. H. Morgan in genetics.
Distinguish between X andY chromosomes. (Mention any 'two' points.)
Explain the types of chromosomes on the basis of position of centromere.
Name the type of cell division involved in the production of sperms by honey bees.
Distinguish between X and Y chromosomes.
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.
An allohexaploidy contains
Codon – anticodon interactions occur by
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 |
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.
Extra nuclear chromosomes occur in ______.
Two or more independent genes present on different chromosomes which determine nearly same phenotype are called ______.
Mendel’s work was rediscovered by three scientists in the year ______.
Chromosomal theory of inheritance was given by ______.
Which of the following statements indicates parallelism in genes and chromosomes?
- They occur in pairs.
- They segregate during gamete formation.
- They show linkage.
- Independent pairs segregate independently.
Experimental verification of the chromosomal theory of inheritance was done by ______.
