Genetic Counseling Video Lessons

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Problem: If a person has two normal copies of the hemoglobin allele, which statements are true? Select all that apply.A. The person is heterozygous at the hemglobin locus.B. The person is susceptible to malaria.C. The person is protected from malaria.D. The person is homozygous at the hemoglobin locus.

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In humans, having an abnormal form of hemoglobin results in the sickle cell variety.  This is a recessive allele that displays codominance in the molecular level. This means that both normal and abnormal hemoglobins are created in heterozygous individuals. 

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Problem Details

If a person has two normal copies of the hemoglobin allele, which statements are true? Select all that apply.

A. The person is heterozygous at the hemglobin locus.

B. The person is susceptible to malaria.

C. The person is protected from malaria.

D. The person is homozygous at the hemoglobin locus.

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Based on our data, we think this problem is relevant for Professor Carter's class at East Tennessee State University.