An example of epistasis is a gene for baldness over a gene for hair colour in humans. Further reading: Polygenic Inheritance Chromosome... View Article
Skin colour, eye colour, height, etc. are examples of polygenic inheritance. Further reading: Polygenic Inheritance Chromosome Structure... View Article
Height is a polygenic trait, it is controlled by at least 3 genes. Individual height varies and has a wide range of possibilities. Further... View Article
Phenylketonuria is an example of pleiotropy. It is a metabolic disorder, which occurs due to a defective gene for the enzyme phenylalanine... View Article
Pleiotropy refers to the single gene having multiple phenotypic expressions, whereas polygenic inheritance refers to a trait being controlled by... View Article
Pleiotropy is a condition in which a single gene has multiple phenotypic expressions. E.g. Phenylketonuria is caused by a single gene defect but... View Article
Yes, phenylketonuria can be detected before birth by doing prenatal tests such as amniocentesis and chorionic villus sampling. Further reading:... View Article
Phenylketonuria is treated by adjusting diet by limiting the intake of protein, rich in phenylalanine. Further reading: Polygenic Inheritance... View Article
When phenylalanine accumulates, it gets converted into phenyl pyruvic acid and other derivatives. It results in brain damage, seizures and mental... View Article
Phenylketonuria causes irreversible damage to the brain and results in mental retardation. It occurs due to the accumulation of phenylalanine in... View Article
If you have PKU or phenylketonuria, foods rich in phenylalanine should be avoided. People with phenylketonuria cannot metabolise phenylalanine... View Article
Phenylketonuria is an autosomal recessive trait so a diseased child inherits two copies of the defective gene, one from each parent. Further... View Article
Phenylketonuria is caused due to the lack of an enzyme that converts phenylalanine into tyrosine, i.e. phenylalanine hydroxylase. It is an... View Article
Two lines on a pedigree mean mating between related individuals, who share the common ancestor, i.e. consanguineous mating. Further reading:... View Article
Genotype refers to the genetic constitution of an organism. It tells about the different alleles present in an organism. Further reading:... View Article
An allele is a different variant or mutant form of a gene. Further reading: Polygenic Inheritance Chromosome Structure Molecular Basis Of... View Article
The main modes of inheritance are autosomal dominant, autosomal recessive, sex-linked dominant and sex-linked recessive. Further reading:... View Article
Pedigree analysis refers to the analysis of inheritable genetic traits in several generations of a family. It is done to study the inheritance... View Article
