Zoology - Principles of Inheritance and Variation Question with Solution | TestHub

Haemophilia is a disease that results in delayed clotting of blood in the individual. It is a sex-linked disorder passing from mother to son. Down's syndrome is caused due to trisomy of the${21}^{st}$chromosome in the individual. It is characterized by a broad flat face with palm having creases. When an individual with$XY$combination has an extra$X$chromosome attached that condition is termed Klinefelter's syndrome. This individual will show the development of breast (gynecomastia) with overall masculine characteristics. Turner's syndrome is when the chromosome combination is$45+\mathrm{ }\mathrm{X}\mathrm{O}$, characterized by having rudimentary sterile ovaries.