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4.Principles of Inheritance and Variation
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Barr bodies (seen in saliva test in Olympic games) are found in human and are associated with
A
Male autosome
B
Female autosome
C
Female sex chromosome
D
Male sex chromosome
(AIPMT-1992)
Solution
(c) According to the British geneticist Mary Lyon $(1961)$, One of the two X-chromosomes of a normal female becomes heterochromatic and appears as Barr body.
Standard 12
Biology
Similar Questions
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Match the columns :
| Column $I$ |
Column $II$ |
| $(1)$ Lethal mutation | $(a)$ Mutation caused by external factors |
| $(2)$ Spontaneous mutation | $(b)$ They are metabolic errors |
| $(3)$ Induced mutation | $(c)$ As a result the mutant dies |
| $(4)$ Biochemical mutation | $(d)$ Most of the mutations occurs in nature are of this type. |
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