Give differences : Haemophilia and Sickle-cell Anaemia
Haemophilia | Sickle-cell Anaemia |
$(1)$ It occur due to a defective recessive allele present on the $X$-chromosome. | $(1)$ It occurs due to point mutation i.e. a single base pair change leads to a change in amino acid. |
$(2)$ The defective allele produce nonfunctional protein which later form a non-functional protein which later form a non-functional cascade of protein involving in blood clotting | $(2)$ In this glutamic ($Glu$) acid is replaced by Valine ($Val$) at sixth position of beta globin chain of haemoglobin molecule. |
$(3)$ It is a sex-linked recessive disorder. | $(3)$ It is an autosomal linked recessive disorder. |
$(4)$ More males are affected than females. | $(4)$ Both males and females are affected equally. |
Which of these is not a Mendelian disorder?
Following pedigree chart shows
The character of organisms is said to be sex linked when its gene is carried on
Colour blindness is a disease usually affecting man but the factor for it is transmitted to the children always by woman. This is because particular factor is located on
Given below is a highly simplified representation of the human sex chromosomes from a karyotype.
The genes $a$ and $b$ could be of