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प्रश्न
The number of pair (s) of sex chromosomes in the zygote of humans is
विकल्प
one
two
three
four
उत्तर
one
Explanation -
In humans, a gamete has one sex chromosome either X or Y. So, a zygote formed from the fusion of two gametes has two sex chromosomes or a pair of sex chromosomes (XX or XY).
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संबंधित प्रश्न
Name the species used in sericulture. Name the stages in the life cycle of a silk moth in cyclic form.
Which of the following is an example of ZW – ZZ type of mechanism of sex determination?
Explain the mechanism of 'sex determination' in birds. How does it differ from that of human beings?
The human animal which has an XY pair of chromosomes is called :
(a) male
(b) hybrid
(c) female
(d) doomed
The number of pair(s) of sex chromosomes in the zygote of humans is :
(a) one
(b) two
(c) three
(d) four
Name two animals which have nineteen pairs of chromosomes.
Drone of the honeybees shows haploid number of chromosomes. Illustrate.
Which type of sex determination is observed in honey bee?
Identify the organism in which ZZ-ZW type of sex determination is observed.
