Does it occur during the development of the zygote, repair of tissue, development or sperm, or a combination of the above?

http://www.onelook.com/?w=meiosis&ls=a

Chloe
Of your multiple choices please read the following site page and I think the answer will be evident:

http://www.answers.com/topic/meiosis

If a fertilized egg from a mouse has 22 chromosomes, you should expect 22 chromosomes in the muscle cell of the same mouse. Is that true or false?

To determine whether the statement is true or false, we need to understand the process of chromosome distribution during meiosis and development of a fertilized egg.

During meiosis, the process of cell division that produces gametes (sperm and eggs) in animals, the number of chromosomes in the cell is reduced by half. This occurs through two rounds of division, resulting in the formation of four cells with half the number of chromosomes as the parent cell. Meiosis is responsible for genetic variation and ensures that offspring receive a unique combination of genes from their parents.

On the other hand, the development of a fertilized egg involves the fusion of a sperm and an egg, resulting in a zygote with a complete set of chromosomes (the diploid number). This zygote will undergo cell division, which includes both mitosis and meiosis, to develop into a multicellular organism.

Therefore, if a fertilized egg from a mouse has 22 chromosomes, it does not necessarily mean that muscle cells of the same mouse will also have 22 chromosomes. The muscle cells will typically contain the diploid number of chromosomes for the specific organism, which in mice is usually 40 pairs or 80 chromosomes.

To summarize, the statement is false. The number of chromosomes in a fertilized egg does not directly determine the number of chromosomes in other cells of the organism.