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Read the following statements related to sex determination and find the correct ones.
a) All eggs have X chromosome and some of the sperms lack the X –chromosome in a large number of insects
b) All the sperms have Z chromosome and some of the eggs have ‘W’ chromosome in birds
c) In butterflies males are heterogametic and females homogametic
d) Peacock is heterogametic

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An Intiative by Sri Chaitanya

a and b only

a, b and c only

c and d

a, b and d only

answer is A.

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Detailed Solution

In butterflies males are homogametic (ZZ) and females are heterogametic (ZO)
The Indian national bird Peacock (ZZ) is a male bird and it is homogametic while Peahen is heterogametic (ZW).

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