Gene duplication is an increase in the number of copies of a gene. It is a type of mutation in which either one or more copies of a gene or the regions of a chromosome are produced. Gene duplication leads the gene families to evolution in a way that one copy of gene continues to perform the original function whereas the other copy tends to produce a new function.
This phenomenon occurs in all organisms and most significant in plants. Several species of fish and plants have their genome fully duplicated. The genes also form their copies during diseased conditions. The cancer is caused when additional copies of the gene are produced.
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.
