How many cells does cell division of meiosis of a parent cell with 23 pairs of chromosomes give? How many chromosomes does a human cell have during prophase? How many copies of each trait does any individual have on each pair of homologous chromosomes?
Compare Mitosis and Meiosis by addressing in which type of cells they occur, how many cells are produced, the ploidy of the cells produced and whether cells produced are identical to the parent cells or different. In what ways is meiosis II similar to and different from mitosis of...
Mitosis produces two cells from one parent using one division event. But meiosis produces four new child cells with two divisions, each of which has half the genetic material of its parent. Mitosis takes place all over the body, while meiosis only takes place in the sex organs and produces ...
When does synapsis occur in meiosis? 02:07 Astral rays arise from 01:29 A diploid living organism develops from zygote undergoes which type of... 01:16 Synaptonemal complex is observed during cell division in 01:34 During G(1) phase of cell division 02:09 How many times a cell has to...
Nondisjunction is the unequal division of genetic material during gamete production. If this occurs in meiosis I all the gametes will be affected. If it occurs in meiosis II, there will be 2 normal gametes and 2 abnormal. Answer ...
This occurs during meiosis, when the X and Y chromosomes separate a bit from the other chromosomes and form an XY body. The Y chromosome gets inactivated by having the X chromosome's inactivation spread over to the Y chromosome. The X chromosome remains inactivated in meiotic spermatocytes, ...
An article describing how Spo11 is removed from chromosome ends to permit homologous recombination to occur in S. cerevisiae. Article CAS PubMed PubMed Central Google Scholar Li, W. & Ma, H. Double-stranded DNA breaks and gene functions in recombination and meiosis. Cell Res. 16, 402–...
During meiosis, precursor cells have two copies of each chromosome that gets copied and distributed equally to four sex cells. The sex cells (sperm and egg) have only one copy of each chromosome. When sperm and egg unite in fertilization, the offspring have two copies of each chromosome. ...
A variation of this occurs when meiosis I occurs properly, and the homologous chromosomes divide during anaphase I. This means that there will be two daughter cells with two sister chromatids in each. However, during meiosis II, nondisjunction can also occur in anaphase II. The sister chromatid...
A new discovery explains what determines the number and position of genetic exchanges that occur in sex cells, such as pollen and eggs in plants, or sperm and eggs in humans. When sex cells are produced by a special cell division called meiosis, chromosomes exchange large segments ofDNA. T...