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प्रश्न
Describe the structure of sex-chromosomes.
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उत्तर
Structure of X and Y chromosomes
- X chromosomes are longer than Y chromosomes.
- X chromosome contains large amount of euchromatin and small amount of
heterochromatin, whereas the Y chromosome contains small amount of euchromatin
and large amount of heterochromatin. - Non-homologous region of X-chromosome contains more genes than that of nonhomologous region of Y chromosome.
- Non-homologous region of X-chromosome contains X-linked genes while nonhomologous region of Y chromosome contains Y-linked genes.
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संबंधित प्रश्न
Define the term ‘genome’.
How many chromosomes do drones of honey bees possess?
Distinguish between X and Y chromosomes.
Choose the correct options of the following question:
Study the given monohybrid cross:
A test cross for this Fj will be:
The A and B genes are 10 cm apart on a chromosome. If an AB/ab heterozygote is test crossed to ab/ab, how many of each progeny class would you expect out of 100 total progeny?
A gene pair hides the effect of another. The phenomenon is ______.
Two or more independent genes present on different chromosomes which determine nearly same phenotype are called ______.
Experimental verification of ‘chromosomal theory of inheritance’ was done by ______.
Genes located on same locus but having different expressions are:
How do genes and chromosomes share similarity from the point of view of genetical studies?
