They are better adapted to the environment. Their darker color helps them blend in with the tree bark so common in their habitat. Because of that, more are likely to not get eaten by predators than white ones that are so easy to spot without camouflage abilities. The black moths are simply more fit to survive, and more of them will survive in this place.
Its classified under cell regulation
Recessive traits often seem to disappear because two recessive alleles are needed to produce the recessive phenotype. They can skip a generation and then reappear if an individual inherits two copies of the recessive gene. Mendel's experiments revealed that phenotypes could be hidden in one generation, only to reemerge in subsequent generations.
Recessive traits disappear because recessive alleles can hide out in heterozygotes, allowing them to persist in gene pools and natural selection can only see the phenotype, not the genotype. While harmful recessive alleles will be selected against and it's almost impossible for recessive alleles to completely disappear from a gene pool.
To learn more about recessive alleles, here
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Answer;
-iron-deficiency anemia.
Liz is likely to be suffering from iron-deficiency anemia.
Explanation;
- Iron deficiency anemia develops when body stores of iron drop too low to support normal red blood cell (RBC) production. It may be caused by the Inadequate dietary iron, impaired iron absorption, bleeding, or loss of body iron in the urine.