Answer:
In the semi-conservative method of DNA replication, each of the strands of the double helix acts as a template for replication.
Explanation:
Semi-conservative DNA Replication:
- Semi-conservative DNA replication produces two daughter helices from the original parent helix. One strand of the daughter helix is form the original template while the other is newly synthesized.
- This means that one strand will have the base sequence identical to the parent, while the other will be complementary to the template.
- This model was experimentally confirmed by an experiment conducted in 1958 by Meselson and Stahl. They used radioactive isotope of nitrogen i.e. N-14 or N-15. DNA molecules made with N-15 were allowed to replicate in the presence of N-14.
- After first replication, DNA molecules contained both N-15 and N-14 isotopes, disproving the conservative model that stated that the new helices are completely identical to the template.
- The second replication yielded only N-14 which disproved the dispersive model that the new helices are a combination of both the template and new strands.
ANSWER:
Jabir Bin Hayab is the purported author of an enormous number and variety of works in Arabic, often called the Jabirian corpus. The works that survive today mainly deal with alchemy and chemistry, magic, and Shi'ite religious philosophy.
The proposal that a human sperm contained a miniature human being is consistent with the now-discredited theory of development known as preformation theory.
Preformation theory, a historically well-liked belief that creatures develop from miniature replicas of themselves, has a long history in biology. Preformationists thought that the shape of living things already existed in reality before their growth, as opposed to being put together from components.
Hippocrates and Anaxagoras were the first thinkers to put forth a preformation theory, with Hippocrates proposing that the zygote contains all of the adult's structural components and Anaxagoras asserting that the paternal semen contains all of the child's components.
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Genes are the proof of evolution and show that we are related to another species that existed long ago. So that means we all share some of the same genes.
