In sickle cell anaemia, the death is caused when the lethal genes are present in

Options

A. Heterozygous condition
B. Homozygous dominant condition
C. Homozygous recessive condition
D. Co–dominant condition

Answer

C

Explanation

Lethal alleles cause the death of the organism that carries them. They are usually a result of mutations in genes that are essential to growth and development.
A person that is homozygous recessive for sickle cell trait will have red blood cells that have incorrect hemoglobin.