EVERYDAY SCIENCE

SCIENCE

GENETIC AND MENDELS LAW OF HEREDITY

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
What is atavism?
A
The genes which show numerous phenotypic effects
B
Reappearance of traits after several generation
C
Effects of mutation
D
Intermediate inheritance of genes
Explanation: 

Detailed explanation-1: -This phenomenon is called atavism-the reappearance of a trait that had been lost during evolution. Our genes do not determine who we are, but with atavism, they can sometimes serve as reminders of our evolutionary past.

Detailed explanation-2: -An atavism refers to a trait that is not present in the immediate predecessors of an individual, although was existent in its ancestors. This is possible due to the way genes behave throughout the evolutionary process.

Detailed explanation-3: -Atavism is the theory that some individual animals for some reason revert back to an earlier evolutionary type. In the case of humans, many behavioral scientists once believed that atavisms caused certain persons to revert in a major way, both physically and mentally, to their animal origins.

Detailed explanation-4: -Atavism is the condition where the recurrence of a particular trait in an organism occurs. It is usually due to genetic recombination. The appearance of teeth in chickens and dewclaws in dogs are common examples of atavism.

Detailed explanation-5: -Atavism is the reappearance of disappeared ancestral characters. Reason: Third molars and hair on body are examples of atavism.

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