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Aneli [31]
3 years ago
14

Define mutation and mutagen.

Biology
1 answer:
Nina [5.8K]3 years ago
4 0
Mutations. Definition. A Mutation occurs when a DNA gene is damaged or changed in such a way as to alter the genetic message carried by that gene. A Mutagen is an agent of substance that can bring about a permanent alteration to the physical composition of a DNA gene such that the genetic message is changed.
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Algea

Explanation:

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Jose and Karl were both exposed to the influenza virus at work. Jose had a flu shot made from killed influenza virus six weeks a
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The correct answer is Karl will get sick and Jose will not this time, but neither will get this influenza again since they both will have acquired active immunity to it.

In the case of Jose artificially active immunity has been induced due to vaccination. A vaccine instigates a primary response against the antigen without resulting in any signs of the disease. On the other hand, Karl will acquire active immunity naturally in future, as when an individual get exposed to a live pathogen, he or she develops the disease, and turns immune as an outcome of the primary immune response.  


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Skin color is controlled by three pairs of alleles. Someone with very light skin has 6 recessive alleles while someone with very
murzikaleks [220]

Answer:

Has three dominant alleles

Explanation:

Skin colour is a polygenetic inheritance and it is controlled by three genes pairs of alleles. The human skin is determined by the amount of melanin it contains. A combination of melanin producing alleles  determines the skin color.

In the above question, the person has a skin color that is midway meaning only half of the alleles produced melanin. The total number of alleles is 6 and half of it is 3. So, only 3 alleles were dominant and the remaining three were recessive.

8 0
3 years ago
What is the role of the water test tube in each phase
ElenaW [278]
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The branch of biology known as evolutionary-developmental biology is the study of:_______.
neonofarm [45]

Answer:

B) how changes in development underpin the evolution of  morphology.

Explanation:

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Thus, Option-B is the correct answer.

4 0
3 years ago
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