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:
If each gene is located on a specific chromosome and that chromosome has two pairs (homologous chromosomes), how does each chromosome represent one allele and why do you label each chromatid with the same allele?
Alleles are a pair of genes that share the same chromosomal location and regulate the same characteristic.
An allele is one of 2 or maybe more variations of a certain genomic location's DNA sequence. For each genomic region with such variation, an individual inherits two alleles, one from every parent. The person is homozygous for the allele if the two alleles are the same.
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