Human Genetics and Disorders

Eugenics is the study of or belief in the possibility of improving the qualities of the human species or a human population, especially by such means as discouraging reproduction by persons having genetic defects or encouraging reproduction by persons presumed to have inheritable desirable traits.

PKU is caused by a deficiency of the enzyme phenylalanine hydroxylase. This enzyme is responsible for converting the amino acid phenylalanine into tyrosine.

Haemophilia is an inherited genetic disorder that impairs the body's ability to make blood clots, a process needed to stop bleeding. Anemia involves a lack of healthy red blood cells, while thalassemia affects hemoglobin production, and color blindness affects vision.

When cancer cells break away from the original tumor and travel through the blood or lymphatic system to form new tumors in other parts of the body, the resulting tumor is called metastatic (spelled 'metastasic' in the options). Benign tumors do not spread, and carcinogenic refers to substances that cause cancer.

Cystic fibrosis is a well-known genetic disorder caused by mutations in the CFTR gene, inherited from parents.

X inactivation, tortoise-shell coat patterns, and Barr bodies are all phenomena related to the dosage compensation mechanism in mammals. Fragile X syndrome is a genetic disorder caused by a mutation in the FMR1 gene, which is distinct from the regulatory mechanism of X inactivation.

Down syndrome is a genetic disorder caused by the presence of all or part of a third copy of chromosome 21, known as trisomy 21.

Sickle cell anemia is an autosomal recessive disorder. An individual must have two copies of the recessive allele (ss) to express the disease.

Genetic mutations are natural occurrences that can happen in any human, not just those with fictional mutant powers. These mutations can be inherited or acquired throughout a person's life.

Cystic Fibrosis is a genetic disorder caused by a mutation in the CFTR gene, which leads to the production of defective cystic fibrosis transmembrane conductance regulator (CFTR) protein. This protein is responsible for regulating the flow of salt and water in and out of cells, and its dysfunction results in the buildup of thick, sticky mucus in the lungs and other organs.

Down Syndrome is the most common genetic disorder in the United States, occurring in approximately 1 in every 700 live births. It is caused by the presence of an extra copy of chromosome 21 and is characterized by intellectual disability, distinctive physical features, and an increased risk of certain health problems.

Cystic Fibrosis is an example of a single-gene disorder, meaning that it is caused by a mutation in a single gene. In this case, the mutation is in the CFTR gene, which leads to the production of defective cystic fibrosis transmembrane conductance regulator (CFTR) protein.

Huntington's Disease is an autosomal dominant genetic disorder, meaning that it is caused by a mutation in a gene located on one of the non-sex chromosomes (autosomes). In this case, the mutation is in the HTT gene, and only one copy of the mutated gene is sufficient to cause the disorder.

Sickle Cell Anemia is a genetic disorder caused by a mutation in the HBB gene, which leads to the production of defective beta-globin protein. Beta-globin is a component of hemoglobin, the protein that carries oxygen in red blood cells. The defective beta-globin protein causes red blood cells to become sickle-shaped, leading to various health problems.