This is a result of asymmetric segregation of the X chromosome in male meiosis II, which gives rise to XX sperm. As a result, either one or two paternally-derived X chromosomes are eliminated from the embryo, which initiates female (XX) or male (X0) development, respectively (Fig. 1B)...
Why is sexual reproduction (meiosis) evolutionarily significant? Explain why the process of meiosis is important for sexual reproduction and the continued diversity of life on earth. Why does DNA not replicate between meiosis I and meiosis II? Why is meiosis necessary for sexually reproducing org...
The extent to which epistasis contributes to adaptation, population differentiation, and speciation is a long-standing and important problem in evolutionar... R.,L.,Malmberg - 《Genetics》 被引量: 377发表: 2005年 Significant competitive advantage conferred by meiosis and syngamy in the yeast Saccha...
"A significant contributor to infertility is defects in meiosis," said Billmyre. "To understand how chromosomes separate into reproductive cells correctly, we are really interested in what happens right before that when the synaptonemal complex forms between them." Previous studies have examined many ...
equity between couples' in progressing to second birth are of significant only with married working women group. In case of married working women, more the husband's houseworking hours increase, the more prone to progress to second ... SM Park - 《Korea Journal of Population Studies》 被引量...
Waist-hip ratio is a significant measure of female attractiveness in humans, which makes sense as the waist is an indicator of fertility while the hips are an indicator of being able to give birth to human infants with their extremely large heads. ...
Any process that causes a given allele to be overrepresented in the gametes following meiosis. Most commonly, the term is restricted to cases in which the distorted segregation ratios affect whole chromosomes rather than just a particular chromosomal location. ...
Significant variations from this tendency occur rarely, as a result of mutation or unusual gene shuffling during meiosis. These variations tend not to accumulate in a population because they are not advantageous for survival or reproduction. (The exception, of course, is those few variations which ...
"What we found," explains team leader Tomoya Kitajima, "is that in older cells, the bivalents sometimes separate early, and this leads to division of sister chromatids in the first stage of meiosis, rather than in the second stage." ...
is turned off (Hartung et al.2006; Crismani et al.2012; Zhu et al.2021). Disabling the DNA helicases FANCM or RECQ4 in plants results in a significant increase in crossover repair rates, suggesting that their role in meiosis is to repair SPO11-dependent DSBs via NCOs and remove ...