Pride and concern: differences between sperm and egg donors with respect to responsibility for their donor-conceived offspringsperm donorsegg donorsgenderComparative research on sperm donors and egg donors in the United States suggests that while men view themselves as fathers of their offspring, women...
Describe the similarities and differences between sperm and egg. Explain the different skeletal muscle types found in humans. Describe the gross anatomy and functions of the stomach, including structural modifications of the wall of the stomach that enhance the digestive process....
Fertilization is when the male gamete (sperms) and the female gamete (egg or ovum) fuse to form a fertilized egg, mainly referred to as a zygote. Fertilization can either be internal or external. Internal fertilization occurs when the male deposits sperms inside the female body during sexual...
SUMMARY1Comparisons have been made between fifty-eight dimensions of the milk teeth of (a) the male and female chimpanzee, (b) the male and female gorilla.2There is no evidence that the milk teeth of the male chimpanzee differ in size from those of the female.3The milk teeth of the mal...
The joining together of a sperm and egg during fertilisation returns the number of the chromosomes to 46. Cells that undergo meiosis go through the cell cycle, including the S phase, so the process begins with chromosomes that consist of two chromatids just as in mitosis. ...
Describe the similarities and differences between sperm and egg. How is the small intestine adapted for the absorption of nutrients? What is the similarity between anatomy and physiology? (a) What did the interior of the small intestine look like? (b) What is it? (c)...
Epithelial cells (17), neuroblastoma cells (16), hepatocytes (18), osteoblasts (33), sperm (5), and egg =-=(6)-=- all show regional variations in membrane composition. In epithelia, these variations are thought to be maintained by tight junctions with adjacent cells in the confluent ...
The reason I think polygenicity is important in this case is that it means there is a huge mutational target that natural selection has to keep an eye on. The constant production of new mutations in sperm and egg cells, the fact that so many of them could affect intelligence, and the fa...
Primordial germ cells (PGCs) are the embryonic progenitors of sperm and egg cells. Mammalian PGCs are thought to actively migrate from the yolk sac endoder... N Aeckerle,C Drummer,K Debowski,... - 《Molecular Human Reproduction》 被引量: 20发表: 2015年 加载更多来源...
We then tested pupal size41,42, adult weight42and starvation resistance43. These characteristics display differences between males and females. The molecular and cellular mechanisms driving these dimorphisms are still incompletely understood and the impact of the Y chromosome size have never been tested...