Cohesin is a complex that is formed by protein molecules and they help in the uniting the sister chromatids, in forming the homologous recombination and in DNA looping. The cohesin protein holds the sister chromatids together after the DNA is being replicated and keep them together till the anaphase where the sister chromatids are separated by the removal of cohesin.
This protein complex gives rise to a structure which resembles a ring and it is postulated that the sister chromatids are trapped inside it. Cohesin also helps in the attachment of the spindle fibers to the chromosomes. It facilitates the repair of DNA by the phenomenon of recombination.
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.
