A carcinogen is a chemical or a physical agent that has a capacity to cause cancer in human beings. They may occur naturally in species like fungus or they may be manmade. The carcinogens interact with the DNA of the cell and lead to genetic mutations. The mutations are caused only in those organisms which get exposed to such agents.
The example of naturally occurring carcinogen is aflatoxin and asbestos, tobacco smoke is the synthetic carcinogens. The aflatoxins are produced by a fungus and may be found in some stored grains too. The exposure to asbestos leads to the development of specific lung cancer which is known as mesothelioma.
How is an F′ factor different from an F factor?
Meiotic nondisjunction is much more likely than mitotic nondisjunction. Based on
In fruit flies, curved wings are recessive to straight wings,
What is an advantage and a disadvantage of this repair system?
Explain the type of speciation (allopatric, parapatric, or sympatric
The raw material for evolution is random mutation. Discuss whether or
With regard to the timing of conjugation, explain why the recipient
A woman who is heterozygous, Bb, has brown eyes;
A recessive allele in mice results in an unusally long neck.
Why is an antibody used in this experiment? From
