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Cloud [144]
3 years ago
5

How does sickle-cell disease affect the immune system?

Biology
1 answer:
kykrilka [37]3 years ago
6 0
Sickle cells can damage your spleen, the organ that helps fight germs as part of your immune system. That can make you more likely to get pneumonia and other infections.
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2. In a certain fish, blue scales (BB) and red scales (bb) are codominant. When a fish has the
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Upon crossing BB with bb, we will get a hybrid of Bb.

  • Codominance is a phenomena in genetics where two alleles (different forms of the same gene) express themselves equally in an organism. As a result, characteristics linked to each allele are shown at the same time.
  • The MN blood group system in humans is an illustration of codominance. M and N alleles control the MN blood type. Red blood cells from people who are homozygous for the M allele carry a surface molecule known as the M antigen. On their red blood cells, those who are homozygous for the N allele contain the N antigen. A heterozygote is a person who carries both antigens.
  • (a) Genotype of blue scales fish will be BB.
  • (b) Genotype of blue scales fish will be bb.
  • (c) Genotype of blue scales fish will be Bb.

So, in this case B and b alleles will express equally.

Learn more about co-dominance:

brainly.com/question/3578928

#SPJ9

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