The male insects have only one sex chromosome, hence they are labelled ___.

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Solution

The correct option is C
XO

In a large number of insects, the sex determination is XX-XO type.

The male insects have only one sex chromosome, hence they are labelled XO

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Certain traits are found only in males since they are present on the Y chromosome.

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	List I		List II
A	In human beings and a number of other animals, there are two types of chromosomes, ______, and allosomes.	1	44+XY
B	_______ are those chromosomes which control functions of the body, other than sex determination. Allosomes or sex chromosomes are the chromosomes that determine the sex of the individual in unisex organisms.	2	Autosomes
C	Human beings have _____ pairs of chromosomes.	3	23
D	_____ determine the sex of the individual.	4	Sex chromosomes
E	The two sex chromosomes of females are similar and are called _____ chromosomes. They are dissimilar in human males. One is a normal-sized X-chromosome. The other is smaller with a good amount of non-function chromatin. It is called the Y-chromosome.	5	XX
F	The chromosome complement of human females is ______	6	44+XX
G	Human males is _____. Human females are homogametic, i.e., produce only one type of gametes or ova (22 + X). Humans are heterogametic, i.e., they produce two types of gametes sperms, angiosperms, and gymnosperms.	7	Autosomes

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