An organism has two chromosomes only. Chromosome 1 has its centromere near one end and carries the A-locus. Chromosome 2 has its centromere at the centre and carries the B-locus. Consider a heterozygous with alleles A and B inherited from one parent and alleles a and b from the other parent. What does the following figure represent?     a. Metaphase of meiosis I   b. Metaphase of meiosis II   c. Metaphase of mitosis   d. Metaphase of mitosis or meiosis II

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Oogenesis

The formation of the ovum (mature female gamete) from undifferentiated germ cells is called oogenesis. This process takes place in the ovaries (female gonads). Oogenesis consists of three stages known as the multiplication phase, growth phase, and maturation phase. 

Cell Division

Cell division involves the formation of new daughter cells from the parent cells. It is a part of the cell cycle that takes place in both prokaryotic and eukaryotic organisms. Cell division is required for three main reasons: