Principles of Inheritance and Variation Question 136
136. Select the correct match
(a) Phenylketonuria - Autosomal dominant trait
(b) Sickle cell anaemia - Autosomal recessive trait, chromosome-11
(c) Thalassemia $-X$ linked
(d) Haemophilia - Y linked
Show Answer
Answer : b
Hints & Solution
(b) Phenylketonuria is an inborn error of metabolism is also inherited as the autosomal recessive trait. Sickle cell anemia is an autosomes linked recessive trait that can be transmitted from parents to the offspring when both the partners are carrier for the gene (or heterozygous). Thalassemia is an inherited blood disorder that causes your body to have less hemoglobin than normal. Hemoglobin enables red blood cells to carry oxygen. Thalassemia can cause anemia, leaving you fatigued. Haemophilia is a sex linked recessive disease, which shows its transmission from unaffected carrier female to some of the male progeny.
