题目(a) What happens to a sperm and an egg during fertilisation? [1]The nucleus of a sperm fuses with the nucleus of an egg.___ 相关知识点: 试题来源: 解析 The nucleus of a sperm fuses with the nucleus of an egg. 反馈 收藏
RNAi is a mechanism used by eukaryotic cells to limit the invasion of foreign genes.Interestingly, most miRNA genes are found in regions of noncoding DNA or within introns of genes. miRNA molecules are transcribed as long precursors and cleaved to form smaller RNA molecules with a hairpin. An...
presented here as a vehicle for discussion rather than a robust hypothesis. An obvious point of contention is the status of the earliest hominins, known from only small isolated samples; relationships both among these species and to the later hominins are not yet resolved. And, while other bra...
Answer and Explanation:1 Haploid:Haploid cells is consist of only one set of chromosomes (n). The most frequent sort of haploid cell is gametes, also known as sex cells... Learn more about this topic: Alternation of Generations | Definition, Stages & Diagram from...
In order to best understand sperm's role in the reproductive process and its passage, it is best to be familiar with the creation of male gametes or sperm also known as spermatogenesis. Being familiar with the reproductive anatomical terminology of both the male, as...
" where changes to the spool-like proteins inside chromosomes can make specific segments of DNA more or less accessible to the proteins that "read" genes. Such epigenetic changes to DNA can be passed onto future generations if the changes occur in sperm or egg cells,Live Science previously ...
What is IUI and who may it be suitable for? Intrauterine insemination (IUI) is a fertility treatment involving artificial insemination where sperm are placed directly into the uterus around the time your ovary releases one or more eggs to be fertilised. ...
This ability, called parthenogenesis, appears to be an ancient trait shared between crocodilians, birds, and dinosaurs. Which means part of Jurassic Park may actually have been able to happen.
It's most likely you will have fraternal triplets, which form when three eggs are fertilized by three different sperm. If this is the case, each of your babies will be as alike (or different) as any other groups of siblings can be. Each baby will have his or her own appearance, perso...
doi:10.1111/j.1600-0897.2009.00758.xRichard BronsonBlackwell Publishing LtdBRONSON R (2009). What the sperm says and the egg hears - a tale of two proteins and more. Am J Reprod Immunol 62: 357-364.