Human disorders such as PKU and sickle-cell anemia, which are defects in the synthesis of individual proteins, are most likely the result of (1) gene mutations (2) nondisjunction (3) crossing-over (4) polyploidy

Sickle cell anemia is caused by a allele because this mutation has more than one effect on the phenotype.

In Sickle-Cell disease is caused by a mutation in a gene that codes for one of the protein's subunits. Which one of the following statements about this disease is correct?Group of answer choicesThe mutation is due to a silent mutation within the alpha subunit that changes an electrically charged amino acid to another electrically charged amino acid.acid.The mutation is due to a missense mutation within the beta subunit that changes an electrically charged amino acid to a nonpolar amino acid.The mutation is due to a missense mutation within the alpha subunit that changes an electrically charged amino acid to a nonpolar amino acid.The mutation is due to a silent mutation within the beta subunit that changes an electrically charged amino acid to another electrically charged amino.

Briefly describe each of the commonly occurring mutations of haemoglobin (thalassemia and sickle cell) and how these affect haemoglobin production and function.

Which is a genetic disorder in which abnormal hemoglobin leads to fragile red blood cells and obstructed blood vessels? (1) phenylketonuria (2) sickle-cell anemia (3) leukemia (4) Down syndrome

The allele for sickle cell anemia leads to multiple changes in the individual's phenotype, including the type of hemoglobin produced, the shape of red blood cells, the onset of anemia, and reduced susceptibility to malaria. The name for these multiple effects on phenotype is ______.Multiple choice question.polygenic inheritancepleiotropygene interactionpseudodominance