Down’s syndrome in humans is due to
Down’s syndrome in humans is due to
- [NEET 2013]
- A
three $‘X’$ chromosomes
- B
three copies of chromosome $21$
- C
monosomy
- D
two $‘Y’$ chromosomes.
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In which genetic condition, each cell in the affected person, has three sex chromosomes $XXY$ ?
In which genetic condition, each cell in the affected person, has three sex chromosomes $XXY$ ?
- [NEET 2019]
The genotype of a boy having sexual characters of a girl is
The genotype of a boy having sexual characters of a girl is