A major question in evolutionary biology is how mating patterns affect the fitness of offspring. However, in animals and seed plants it is virtually impossible to investigate the effects of specific ...

Evolution, Vol. 71, No. 2 (FEBRUARY 2017), pp. 215-226 (12 pages) Many organisms spend a significant portion of their life cycle as haploids and as diploids (a haploid–diploid life cycle). However, ...

This is a preview. Log in through your library . Abstract Haploids were produced by UV irradiation of fertilized eggs 10 minutes after laying, when the female pronucleus can be inactivated. Some ...

A life cycle is a period involving one generation of an organism through means of reproduction, whether through asexual reproduction or sexual reproduction. In regard to its ploidy, there are three ...

Stem cell research holds huge potential for medicine and human health. In particular, human embryonic stem cells (ESCs), with their ability to turn into any cell in the human body, are essential to ...

A haploid cell with 23 chromosomes (left), and a diploid cell with 46 chromosomes (right). Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert!

Sometimes less is more. Scientists have created a new kind of human stem cell that has just half a genome. The cells can be turned into any tissue in the human body, despite only containing one set of ...

What establishes the male or female sex of an ant? In humans, it is X and Y chromosomes that assume this function: women have two X chromosomes while men have one X and one Y chromosome. In ants, bees ...