Tay-Sachs disease which is caused by a recessive allele in the homozygous condition is extremely rare in the US population as a whole It is almost unknown in black Americans but is relatively common?

Tay-Sachs disease is a genetic disorder caused by a recessive allele, leading to severe neurological decline and early death. It is particularly common among individuals of Ashkenazi Jewish descent, where the carrier rate is significantly higher. In contrast, the disease is rare in the general U.S. population and virtually absent in Black Americans, reflecting the varying prevalence of the recessive allele across different ethnic groups. This highlights the importance of genetic screening and understanding population-specific risks in genetic disorders.