allerySickle-cell anaemia is a:
AAutosome-linked recessive disorder
BX-linked recessive disorder
CY-linked disorder
DAutosomal dominant disorder
Answer & Solution
Correct answer: A. Autosome-linked recessive disorder
**Sickle-cell anaemia = autosome-linked recessive** trait.
Diseased only in homozygotes Hb^S Hb^S. Heterozygotes Hb^A Hb^S show 'sickle-cell trait' (carrier, no full disease) and have some protection against malaria.
Keep practising Unit 7A: Natural Selection & Evolutionary Mechanisms
Browse all Unit 7A: Natural Selection & Evolutionary Mechanisms questions for AP Biology, or explore more Biology topics.
Related questions
NEET · Biology · Whittaker's Five KingdomsDown's syndrome is caused by:β-Thalassemia is controlled by which gene?Which of the following is a mutagen?In grasshopper, the sex-determination mechanism is:In humans, the sex-determination mechanism is:The ABO blood-group gene (I) has how many alleles in the human population?Mendel's Law of Independent Assortment is best illustrated by the F₂ phenotypic ratio of: