Furthermore, the in vitro-expanded ASGs were confirmed to exhibit stem cell activity and possessed potency to differentiate into functional eggs and sperm in recipient gonads, allowing for production of viable offspring following fertilization. Results In vitro culture of Sertoli cells To establish a ...
Papadaki M., Papadopoulou M., Siggelaki I., Mylonas C.C. 2008. Egg and sperm production and quality of sharpsnout sea bream (Diplodus puntazzo) in captivity. Aquaculture 276 (1-4): 187-197. DOI: 10.1016/j.aquaculture.2008.01.033....
The body must then reduce the number of chromosomes by half to go into the sex cells. To do this, it randomly sorts chromosomes from both sets in one cell division and then reduces them by half in another. Therefore, each sperm or egg that the body produces is unique -- it contains ...
A single copulation with a normal male has at most a minor and short-lasting effect on the eggproduction rate of a female, even when enough sperm is transferred to make possible production of some fertile eggs for several weeks. Not enough sperm is transferred to allow fertilization of all ...
The male gametes (sperm) are approaching a female gamete (an unfertilized egg) prior to conception.Credit: Science Picture Co/Subjects/Getty Images Male and female sex cells are dramatically different from one another in size and shape. Male sperm resembles long, motile projectiles. They are sma...
The egg and sperm cells produced by the archegonia and antheridia fuse during sexual reproduction and produce a diploid zygote. As a refresher on some of these terms, diploid means having two sets of chromosomes in your cells and is usually written as '2n', while haploid means having only ...
Intracytoplasmic sperm injection in the mouse. Biol. Reprod. 52, 709–720 (1995). Article CAS PubMed Google Scholar Wakayama, T. et al. Differentiation of embryonic stem cell lines generated from adult somatic cells by nuclear transfer. Science 292, 740–743 (2001). Article CAS PubMed ...
They are large cells that get released from the ovaries to the fallopian tubes upon ovulation, which occurs around the middle of the menstrual cycle. Upon gamete fusion and zygote formation, the organelles found in the egg are what contribute to zygote development into an embryo, as the sperm...
Infertilization: Sperm-egg association …spermatozoa undergo physiological change, called capacitation, which is a prerequisite for their participation in fertilization; they are able to undergo the acrosome reaction, traverse the egg envelopes, and reach the interior of the egg. Dispersal of cells in...
The ovaries are paired oval-shaped organs that produce sex hormones, such as estrogen, progesterone, and testosterone. Additionally, the ovary supports the development and maintenance of oocytes, egg cells. The fallopian tubes are...