In order for organisms to grow, cells have two options: they must either replicate themselves to create more cells, or the cells themselves must expand in volume. In humans, tissues such as the skin ...

Meiosis, the process by which haploid products are created from diploid precursors, is central to sexual reproduction. Meiosis can be thought of as a modified mitotic division with notable ...

Chromosome segregation is a fundamental process that is necessary for the propagation of all organisms. In meiosis there is a unique form of chromosome segregation in which sister chromatids ...

This activity and guide has been thoughtfully designed to help you fully understand exactly what's happening at every stage of mitosis. Mitosis will produce two daughter cells which are genetically ...

One of the worst things that can happen to a cell is to end up with the wrong number of chromosomes. This can happen if something goes wrong during cell division, and it can lead to infertility, ...

Germ cell fate decisions are poorly understood, despite their central role in reproduction. One fundamental question has been whether germ cells are regulated to enter the meiotic cell cycle (i.e., ...

Multicellular eukaryotes and single-celled sex cells reproduce by a process called meiosis. In this process, the number of chromosomes in a mother cell is halved to produce gametes, cells that fuse ...

The activity on this page has been designed by educational experts to help you to understand the three stages of mitosis. Interact with the activity to see the mitosis phases and descriptions. Mitosis ...

In a study of meiosis in budding yeast, a research team found that yeast senses temperature changes by increasing the level of DNA negative supercoils to increase crossovers and modulate chromosome ...

This is a preview. Log in through your library . Abstract Cytological evidence from Haplopappus gracilis (n = 2) and the complex heterozygote, Rhoeo discolor (n = 6), supports previous hypotheses and ...