Give differences : Mendelian disorders and Chromosomal disorders
Mendelian disorders | Chromosomal disorders |
$(1)$ These are due to alteration in a single gene. | $(1)$ These are caused due to absence or excess of one or more chromosomes of abnormal arrangement of one/more chromosomes. |
$(2)$ They are transmitted into generations through Mendelian principles of inheritance. | $(2)$ They are transmitted as the affected individual is sterile. |
$(3)$They may be recessive or dominant in nature. | $(3)$ This is always dominant in nature. |
$(4)$ Examples : Colour blindness, Phenylketonuria. | $(4)$ Examples : Down's syndrome, Turner's syndrome. |
An abnormal male child is born to normal parents. This child shows a short neck, stubby hands, slanting eyes, permanently open mouth with projecting upper lip and short stature. This abnormality can be attributed to
Gynaecomastia is the symptom of
The condition in which there are more than two complete set of chromosome is called
Genotype of a Down's syndrome is
A person who has $47$ chromosomes due to an extra $X$ chromosome is affected by