In the process of replicating themselves, cells have another choice: do they want to make an identical copy and be left with two cells? Or do they want to make four “half-copies”, in preparation for ...

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 ...

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 ...

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 ...

The activity on this page was designed by science education experts to explain and visualise the three stages of mitosis. By interacting with the activity, you'll see the mitosis phases and ...

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 X and Y chromosomes make an unlikely pair. The X is large and contains thousands of genes critical for life. The Y, by contrast, is small, with only a handful of genes. Its main purpose is to ...

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 ...

A team deciphers complicated mechanism underlying genetic diversity. Movies such as 'X-Men,' 'Fantastic Four,' and 'The Guardians,' which showcase vibrant mutant heroes, have captivated global ...

This is a preview. Log in through your library . Abstract In this paper we have traced the evolution of the cytoplasmic organelles in the female germinal cell of Pisum sativum L., from the beginning ...

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 ...