Barr body was first discovered by:
A) Lyon
B) Murray Barr
C) Bridges
D) Morgan
Barr bodies are also known as:
A) Golgi bodies
B) Sex chromatin
C) Fat bodies
D) All of the above
Barr bodies are:
A) Sex chromatin positive
B) Sex chromatin negative
C) Sex chromatin neutral
D) All of the above
The number of Barr bodies in a female cell is always:
A) One less than X chromosomes
B) Equal to X chromosomes
C) One more than X chromosomes
D) Two more than X chromosomes
In Klinefelter syndrome (XXY), the number of Barr bodies is:
A) Nil
B) One
C) Two
D) Three
The phenomenon of dosage compensation was proposed by:
A) Murray Barr
B) Lyon
C) Muller
D) Bridges
The first case of sex reversal was reported by:
A) Bridges
B) Muller
C) Crew
D) McLung
Colour blindness is governed by a recessive gene located on:
A) Y chromosome
B) X chromosome
C) Autosomes
D) All of the above
Holandric genes are present on:
A) Y-chromosome
B) X-chromosome
C) Autosomes
D) All of the above
In honeybee, larvae which feed on royal jelly develop into:
A) Sterile female
B) Fertile queen
C) Haploid male
D) All of the above

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