a B B A C B 7 B e y p The figure above shows images of five different cells. Each box contains an image that represents a cell of an AaBb dihybrid that is in some stage of meiosis or mitosis. The lines represent chromatids. The letters on the lines represent alleles. The shaded region shows the shape of the cell. Refer to this figure as you consider the questions below. Each box contains an image that represents a cell of an AaBb dihybrid that is in some stage of meiosis or mitosis. The lines represent chromatids. The letters on the lines represent alleles. The shaded region shows the shape of the cell. Refer to this figure as you consider the questions below. Each box represents a cell in meiosis or mitosis. The lines represent chromatids. The letters next to the lines represent alleles. The shaded region shows the shape of the cell. The A gene controls an X-linked trait. The B gene controls an autosomal trait. Refer to this figure as you consider questions X-Y below 8) Which of the images shows a cell that contains a Y chromosome? a) boxes a, b, and c b) boxes c, d, and e c) boxes b and e d) boxes a and c e) all of them
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:
Mammals including humans show XY sex determination system in which the presence of Y-chromosome is responsible for male individuals and the absence of Y-chromosome (two X-chromosomes) is responsible for female individuals. By observing the chromosomal content we can determine the sex of an individual.
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