Oogenesis is a growth process in which the female gametes are produced. The primary egg cell is differentiated into a mature ovum through a series of processes. The development of an egg starts when the fetus is still in its developmental phase. The primary oocytes which are to be differentiated into mature ova keep on dividing until the ovaries constitute all the eggs which an adult female will release during her reproductive years.
When the primary oocyte is released from the ovary, it undergoes the process of cell division and hence the chromosome divides into two cells. One cell which is larger in size is termed as secondary ovum and the one which is smaller is called the polar body. The secondary ovum is then matured and is carried to the fallopian tube where it gets fertilized by the sperm cells.
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.
