This area encircles the tiny categories of sperm and egg. ... The first actual phase of both cell cycles, prophase, focuses on packaging DNA. ... Each pole of a somatic cell has the same number amount of DNA as each pole of a sex cell. ... This means in prophase, no crossing over; in metaphase, the chromosomes align on the metaphase plate not homologs; in anaphase, sister chromatids separate not chromosomes; and finally in telophase/cytokinesis, each daughter cell has its own two daughter cells, known as zygotes (sperm and egg), each contain half the DNA of somatic cells in the body. The impo...

• Word Count: 1248
• Approx Pages: 5

The primary types of cells that are affected by this disease are muscle cells because XYY syndrome weakens the muscles and bones. ... In a normal cell, the nucleus contains 46 chromosomes, 23 from the egg and 23 from the sperm. In contrast, a cell infected with XYY syndrome will have 47 chromosomes in the nucleus, 23 from the egg and 24 from the sperm. ... Chromosomes are made up of two molecules: a protein and a single molecule of DNA. ... Because males with XYY syndrome have an extra chromosome containing extra DNA, there is an error in the DNA code for how the proteins should fold, and the ...

• Word Count: 802
• Approx Pages: 3
• Has Bibliography
• Grade Level: Undergraduate

this is the number of chromosomes found i our somatic (body) cells. ... thus the egg cells are 22+X, whereas spermatozoa are either 22+X or 22+Y. hence when egg and sperm fuse at fertilisation the diploid number is restored later on we shall see that germ cells have a special form of cell division called meiosis to bring about this reduction in the number of chromosomes. ... Drosophila (fruit fly) has 6 to 10 Felis (cat) has 38 Pan (chimpanzee) has 48 Macaca mulatta (rhesus monkey) 42 Homosapiens (man) has 46 but.- Paramecium has 60-123 Cyprinus (carp)- has 100-104 in other w...

• Word Count: 947
• Approx Pages: 4
• Grade Level: High School