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How many eggs are produced from one oocyte?
one cell is produced from one primary oocyte.
During oogenesis an oogonium directly gives rise to what?
A primary oocyte
Are fingers made of diploid cells or haploid cells?
Fingers are made of diploid cells. Haploid cells are the reproductive cells.
What is the haploid number for a tiger?
19
Where would you locate haploid cells in a cat?
Haploid cells in a cat would typically be found in the reproductive organs, such as the testes and ovaries. These organs produce gametes (sperm and egg cells), which are haploid cells containing half the number of chromosomes as a normal body cell.
What is a haploid female sex cell produced by meiosis called?
Oocyte
Is the polar body a haploid cell?
Yes, polar bodies are haploid cells. They are produced during oogenesis when the cytoplasm of the primary oocyte is unequally divided during meiosis, resulting in one large secondary oocyte and two smaller polar bodies.
What is another name for an immature egg cell?
gametes, sex cells, haploid cells. the process is meiosis.
Compare and contrast Primary oocyte and secondary oocyte?
Primary oocytes are diploid cells that have undergone DNA replication but are arrested in prophase I of meiosis, whereas secondary oocytes are haploid cells resulting from the division of primary oocyte after completing meiosis I. Secondary oocytes are arrested in metaphase II and are released during ovulation, while primary oocytes are present in the ovaries prior to puberty.
When does an oocyte complete meiosis II?
Meiosis II is completed after entry of sperm.
When a cell contains only one chromosome of each homologous pair the cell is?
ploidy is the classification based on the number of homologous chromosomes present. if there is only one pair of homologous chromosomes then the nucleus is said to be haploid if there are two pairs then it is known as diploid if three it is triploid if many it is noted as polyploidy --------------------------- an oocyte or a spermatocyte are haploid cells in a species that normally have diploid cells.
When does an oocyte become a haploid cell?
meiosis starts off with interphase where it is a normal double chromosomed (chromatid because it is still loose and not in chromosome form yet) thingy. Then prophase I occurs which causes the chromosome to make rods of DNA called chromosomes, but these chromosomes are double homologous chromosomes because the DNA has been copied during the S phase of interphase (still diploid at this point). Then after metaphase, anaphase, and telophase, 2 new cells start forming and we know that metaphase, anaphase, and telophase split the double homologous chromosomes, so then the new cells still have double chromosomes (haploid but there are 2 copies of each chromosome), and another round of meiosis occurs (meiosis II) which splits the double chromosomes into just normal halpoid gametes. All this is in accordance to humans
What layers do sperm penetrate to fertilize the oocyte?
Sperm penetrate through the zona pellucida, an acellular glycoprotein layer surrounding the oocyte, to reach the oocyte membrane for fertilization. The sperm then binds to specific receptors on the oocyte membrane to release enzymes that help in penetrating the oocyte membrane to fuse with the oocyte.
What happens to the 4 haploid cells after meiosis?
Depends. In males all four cells become sperm. In females one becomes to oocyte while the other three become polar bodies that can provide some nutrients to the oocyte, or just dissipate depending on species.
If a normal somatic cell from a certain diploid species contains 84 chromozones a sperm oocyte contains what chromozones?
A sperm or oocyte of the diploid species would contain 42 chromosomes, as they are haploid cells with half the number of chromosomes found in somatic cells. This is due to the process of meiosis where the number of chromosomes is halved to create sex cells.
When a primary oocyte divides a secondary oocyte and what are produced?
A primary oocyte divides into a secondary oocyte and a polar body during meiosis I. The secondary oocyte undergoes meiosis II to produce a mature ovum (egg) and another polar body.
Function of the polar bodies in oogenesis?
Although the polar bodies do not become anything they do serve a purpose in reproduction/oogenesis. The polar bodies are the byproducts of the primary and secondary oocyte at each point of meiotic division in oogenesis. The polar body allows for the oocyte to get rid of chromosomes while at the same time taking the least amount of resources (cytoplasm) from the oocyte. Each meiotic division serves as a means of moving the oocyte toward its need haploid number of chromosomes for fertilization. So you could say that the polar bodies function as a means of cellular structure conservation. They help ensure that the oocyte remains nutrient/resource rich while at the same time helping the oocyte reach its haploid number.
