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प्रश्न
A male honeybee has 16 chromosomes whereas its female has 32 chromosomes. Give one reason.
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उत्तर १
Male honey bees are born from unfertilised eggs, whereas female honey bees are born from fertilised eggs. Because the unfertilised egg carries half the number of chromosomes as compared to the fertilised egg, male honey bees have half the number of chromosomes as compared to female honey bees.
उत्तर २
A male honeybee has 16 chromosomes because it is haploid, developing from unfertilized eggs by parthenogenesis. A female honeybee has 32 chromosomes because it is diploid, developing from fertilized eggs and thus having two sets of chromosomes. This is the haplodiploid mechanism of sex determination in honeybees.
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संबंधित प्रश्न
Name the type of cell division involved in the production of sperms by honey bees.
Distinguish between X and Y chromosomes.
Define the Homologous chromosomes
Short Answer Question.
Explain the chromosomal theory of inheritance.
Write the salient features of the Sutton and Boveri concept.
Mention the name of man-made cereal. How it is formed?
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 |
Telocentric chromosome differs from acrocentric chromosome in that ____________.
Read the following statements regarding 'X and Y' chromosomes and select the correct option.
P - Due to presence of large amount of euchrornatin X chromosome is genetically more active.
Q - Due to presence of small amount of heterochromatin Y chromosome is genetically more active.
A plant having the genotype AABbCC will produce ______ kinds of gametes.
A gene pair hides the effect of another. The phenomenon is ______.
Extranuclear inheritance occurs in ______.
Two or more independent genes present on different chromosomes which determine nearly same phenotype are called ______.
Chromosomal theory of inheritance was given by ______.
Genes located on same locus but having different expressions are:
In a karyotype analysis, X and Y chromosomes represent sex chromosomes.
Name the scientist who discovered the X chromosome.
Consider the following information and answer the question that follows:
|
Make a single pedigree chart using the above information to show the pattern of inheritance of phenylketonuria (PKU) in the family of Reshma.
Despite differing in size and morphology, what equal contribution do male and female gametes make to offspring according to the Chromosomal Theory?
Which scientist provided the first experimental proof of the Chromosomal Theory of Inheritance using Drosophila melanogaster?
In what year did Walter Sutton publish the formal paper "The Chromosomes in Heredity" that linked Mendel's laws to chromosome behaviour?
