Natural selection only acts directly on phenotype, not genotype. It acts directly on an organisms characteristics, not its alleles. Natural selection never acts directly on genes.
The offspring of a red chicken and a white chicken would most likely be a cross of red and white. If the white gene is dominant, it will be white. If the red gene is dominant, it will be red.
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Answer:
true
Explanation:
Penicillin is a bacteria so it means it causes the production of antibodies which then boost the immune system.
It is like vaccination; small doses of the inactive form of the infection is injected into the body in order for the body to create antibodies resistant to such infection(thereby boosting the immune system).
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