Turner's syndrome in human is caused by
Autosomal aneuploidy
Sex chromosome aneuploidy
Polyploidy
Point mutation
Match the following:
Column – I | Column $- II$ |
$(1)$ Failure of cytokinesis | $(p)$ To study in beritance of particular traits |
$(2)$ Trisomy of 21 | $(q)$ Polyploidy |
$(3)$ Error of metabolism | $(r)$ Down's syndrome |
$(4)$ Pedigree analysis | $(s)$ Phenylketonuria |
Which of the following statements are correct about Klinefelter's Syndrome?
$A$. This disorder was first described by Langdon Down $(1866)$.
$B$. Such an individual has overall masculine development. However, the feminine developement is also expressed.
$C$. The affected individual is short statured.
$D$. Physical, psychomotor and mental development is retarded.
$E$. Such individuals are sterile.
Choose the correct answer from the options given below:
A cell at telophase stage is observed by a student in a plant brought from the field. He tells his teacher that this cell is not like other cells at telophase stage. There is no formation of cell plate and thus the cell is containing more number of chromosomes as compared to other dividing cells. This would result in
A person having $45$ chromosomes where $Y$ chromosome is absent. Such a condition is known as
A person who has $47$ chromosomes due to an extra $X$ chromosome is affected by