During oogenesis in an animal species with a haploid number of 6, one dyad undergoes nondisjunction during meiosis II. Following the second meiotic division, this dyad ends up intact in the ovum. How many chromosomes are present in (a) the mature ovum and (b) the second polar body? (c) Following fertilization by a normal sperm, what chromosome condition is created?
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:
During oogenesis in an animal species with a haploid number of
6, one dyad undergoes nondisjunction during meiosis II. Following
the second meiotic division, this dyad ends up intact in the
ovum. How many chromosomes are present in (a) the mature
ovum and (b) the second polar body? (c) Following fertilization
by a normal sperm, what chromosome condition is created?
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