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Assertion :According to Pangenesis hypothesis of Darwin all the somatic cells of the body not only multiply by cell division, but also give off minute particles throughout their life cycle, called as gemmules, which keep on wandering throughout the body. Reason: It is explained by certain members of Porifera.
Assertion :According to Pangenesis hypothesis of Darwin all the somatic cells of the body not only multiply by cell division, but also give off minute particles throughout their life cycle, called as gemmules, which keep on wandering throughout the body. Reason: It is explained by certain members of Porifera.
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Solution
The correct option is C Assertion is correct but Reason is incorrect.
Assertion is correct, but reason is incorrect.Darwin was known as the father of medicine who believed in the inheritance of acquired characteristics, and, to account for this, he devised the hypothesis known as pangenesis. He postulated that all organs of the body of a parent gave off invisible “seeds,” which were like miniaturized building components and were transmitted during sexual reproduction.No mechanism was known for inheritance, and so in the Variation, Darwin devised his hypothesis of “pangenesis” to explain the discrete inheritance of traits. He imagined that each tissue of an organism threw out tiny “gemmules,” which passed to the sex organs and permitted copies. Pangenesis was Charles Darwin's hypothetical mechanism for heredity. The etymology of the word comes from the Greek words pan (a prefix meaning "whole", "encompassing") and genesis ("birth") or genos ("origin"). The hypothesis was eventually replaced by Mendel's laws of inheritance.
Assertion is correct, but reason is incorrect.
Darwin was known as the father of medicine who believed in the inheritance of acquired characteristics, and, to account for this, he devised the hypothesis known as pangenesis. He postulated that all organs of the body of a parent gave off invisible “seeds,” which were like miniaturized building components and were transmitted during sexual reproduction.
No mechanism was known for inheritance, and so in the Variation, Darwin devised his hypothesis of “pangenesis” to explain the discrete inheritance of traits. He imagined that each tissue of an organism threw out tiny “gemmules,” which passed to the sex organs and permitted copies.
Pangenesis was Charles Darwin's hypothetical mechanism for heredity. The etymology of the word comes from the Greek words pan (a prefix meaning "whole", "encompassing") and genesis ("birth") or genos ("origin"). The hypothesis was eventually replaced by Mendel's laws of inheritance.
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