it's the duplication of the 21st chromasome
Marfan syndrome is primarily caused by mutations in the FBN1 gene, which encodes a protein called fibrillin-1. However, there are rare cases where mutations in other genes can also lead to a Marfan-like syndrome. So, it can be considered a single gene disorder with some exceptions.
A single gene can influence multiple traits A single trait can be controlled by multiple genes
Cockayne syndrome is a autosomal disorder caused by a mutation in two genes. It causes short stature and sometimes aversion to sunlight.
Down's syndrome is a disorder caused by defective genes. It is most commonly caused by parents who are elderly at the time of birth.
The exact genes involved in Tourette syndrome are not fully understood, but it is believed to be a complex disorder with multiple genetic and environmental factors. Variations in several genes, especially those related to brain development and neurotransmitter function, are thought to contribute to the development of Tourette syndrome. There is no single gene or chromosome that is consistently mutated in all individuals with Tourette syndrome.
Yes
Yes
Zellweger syndrome is caused by mutations in genes that are involved in the formation of peroxisomes, which are cell structures responsible for breaking down fatty acids. These mutations lead to the absence or dysfunction of peroxisomes in cells, resulting in the accumulation of toxic substances and causing the characteristic symptoms of the syndrome.
Eye color is caused by multiple genes, which are inherited.
yes its called pleiotropy
No she does not. The prominence in the foreheads of most of the children is caused by the inherited Asian genes from the father.
Stickler syndrome is caused by mutations in genes responsible for producing collagen, a protein important for the structural integrity of connective tissues such as cartilage and the vitreous of the eye. These mutations result in abnormalities in these tissues, leading to symptoms such as joint hypermobility, cleft palate, and vision problems.