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4.Principles of Inheritance and Variation
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Gynandromorphs develop in Drosophila when the two cells in the two-celled proembryo will have one of the following chromosomal sets
A
$2A + XX$ in one cell and $2A + X$ in the other
B
$2A + X$ in both the cells
C
$2A + XXX$ in both the cells
D
All of the above
Solution
(a) Gynandromorphs are formed due to misdivision of chromosomes and start as female with $2A + 2X$ chromosomes.
One of the $x$-chromosomes is lost during the division of the cell with the result that one of the daughter cells possesses $2A + 2X $chromosomes and the other $2A + X.$
Standard 12
Biology
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