Question

More than one choice may apply. A child is diagnosed with sickle cell anemia. This means that
a. One parent had sickle cell anemia.
b. One parent carried the sickle cell gene.
c. Both parents had sickle cell anemia.
d. Both parents carried the sickle cell gene.

Accepted Answer

Understand the genetic basis of sickle cell anemia: Sickle cell anemia is an autosomal recessive disorder, meaning that a child must inherit two copies of the defective gene (one from each parent) to develop the condition. Review the inheritance patterns: If a child has sickle cell anemia, both parents must have contributed a defective copy of the sickle cell gene. This means both parents are either carriers (heterozygous for the gene) or have sickle cell anemia themselves (homozygous for the gene). Analyze option a: If one parent had sickle cell anemia, they would pass one defective gene to the child. However, the child would still need a defective gene from the other parent to develop the condition. Analyze option b: If one parent carried the sickle cell gene, the child would only inherit one defective gene, which would make them a carrier, not someone with sickle cell anemia. This option alone cannot explain the diagnosis. Analyze option d: Both parents carrying the sickle cell gene (heterozygous carriers) is the most likely scenario for the child to inherit two defective copies of the gene, leading to sickle cell anemia. This aligns with the autosomal recessive inheritance pattern.

More than one choice may apply. A child is diagnosed with sickle cell anemia. This means that
a. One parent had sickle cell anemia.
b. One parent carried the sickle cell gene.
c. Both parents had sickle cell anemia.
d. Both parents carried the sickle cell gene.

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Concetti chiave

Sickle Cell Anemia Genetics

Carrier Status

Punnett Square

More than one choice may apply. A child is diagnosed with sickle cell anemia. This means that a. One parent had sickle cell anemia. b. One parent carried the sickle cell gene. c. Both parents had sickle cell anemia. d. Both parents carried the sickle cell gene.

Risposta video verificata per un problema simile:

Concetti chiave

Sickle Cell Anemia Genetics

Carrier Status

Punnett Square

More than one choice may apply. A child is diagnosed with sickle cell anemia. This means that
a. One parent had sickle cell anemia.
b. One parent carried the sickle cell gene.
c. Both parents had sickle cell anemia.
d. Both parents carried the sickle cell gene.