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lana66690 [7]
3 years ago
15

What is the outer covering ( like a blanket) noted as a landmark on bone?

Biology
1 answer:
Fittoniya [83]3 years ago
3 0
That’s the periosteum. it’s a hard membrane, which muscles and ligaments are attached to, under which blood flows through the bone
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The sickle cell allele is recessive. Hence, in order for any child of the couple to have sickle cell anemia, such a child will have to inherit an affected allele each from the two parents. This means that both the father and the mother must have affected alleles in their genotypes. In other words, two sickle cell alleles are required for the abnormality to manifest.

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Assuming the genotype of the father is AA:

          SS   x   AA

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Assuming that the genotype of the father is AS

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      AS   SS   AS   SS

<em>50% of the children would have sickle cell while the remaining 50% would be normal.</em>

<u>Therefore, in order to produce children with sickle cell, the father has to be AS, otherwise, he has to be AA.</u>

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