Answer:
All the puppies have black hair because albino alleles are found in two different genes.
If we let the letters A and B represent the two different pigmentation genes, the one of the dogs is AAbb, and the other is aaBB.
Their offspring are AaBb and so there are not albinos because they have one dominant copy of each gene.
<span>It is true that lower temperatures lead to slower soil formation. The lower the temperature in the air is, the slower the soil is going to form. In order for soil to form properly and completely, it needs to have some warmth because heat helps this process run faster. </span>
No, the sickle-cell anemia allele won't be eliminated by natural selection.
Sickle-cell anemia trait is controlled by a single gene and the allele (S) for sickle-cell anemia is a harmful autosomal recessive.
It is caused by a mutation in the normal allele (A) for hemoglobin (a protein on red blood cells).
Heterozygotes (AS) with the sickle-cell allele are resistant to malaria, a deadly tropical disease. It is common in many African populations.
In these areas, (S) carriers have been naturally selected, because their red blood cells, containing some abnormal hemoglobin, tend to be in sickle shape when they are infected by the malarial parasite.
Therefore, they are more likely to survive and reproduce. This keeps the S allele in the gene pool.
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Explanation:
A change of the form or nature of a thing or person into a completely different one, by natural or supernatural means.
