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.
Meiotic nondisjunction is much more likely than mitotic nondisjunction. Based on
A woman who is heterozygous, Bb, has brown eyes;
Explain why familial breast cancer shows a dominant pattern of inheritance in
How is an F′ factor different from an F factor?
With regard to the timing of conjugation, explain why the recipient
The raw material for evolution is random mutation. Discuss whether or
Why is an antibody used in this experiment? From
Explain the type of speciation (allopatric, parapatric, or sympatric
In fruit flies, curved wings are recessive to straight wings,
A recessive allele in mice results in an unusally long neck.
