A sample of DNA from a person suspected of having sickle-cell anaemia is subjected to DNA hybridization using two probes. One that binds to the normal allele and another that binds to the sickle-cell allele. If both probes bind to the DNA, this individual

Question

A sample of DNA from a person suspected of having sickle-cell anaemia is subjected to DNA hybridization using two probes. One that binds to the normal allele and another that binds to the sickle-cell allele. If both probes bind to the DNA, this individual (A) is homozygous dominant for the sickle-cell gene (B) is heterozygous for the sickle-cell gene. (C) is heterozygous recessive for the sickle cell gene. (D) has sickle cell anaemia.

Tardigrade Admin · Accepted Answer

Correct answer is (c) is heterozygous recessive for the sickle cell gene.

Q. A sample of DNA from a person suspected of having sickle-cell anaemia is subjected to DNA hybridization using two probes. One that binds to the normal allele and another that binds to the sickle-cell allele. If both probes bind to the DNA, this individual

is homozygous dominant for the sickle-cell gene

is heterozygous for the sickle-cell gene.

is heterozygous recessive for the sickle cell gene.

has sickle cell anaemia.

Correct answer is (c) is heterozygous recessive for the sickle cell gene.