Chromosome complement with $2n-1$ is called as
Monosomy
Nullosomy
Trisomy
Tetrasomy
Give differences : Mendelian disorders and Chromosomal disorders
In which genetic condition, each cell in the affected person, has three sex chromosomes $XXY$ ?
Down's syndrome is an example of
It is character of disorder which described by Langdon Down.
What is Down’s syndrome ? Give its symptoms and cause. Why is it that the chances of having a child with Down’s syndrome increases if the age of the mother exceeds forty years ?