Ogbuewu , U. Ogundu , M. Opara , I. Okoli , D.
Gender Selection: the Shettles Method
biology - Do sperm that carry male chromosomes swim faster? - Skeptics Stack Exchange
Normal human spermatozoa carry either the X or the Y chromosome. The differences between X and Y spermatozoa X and Y haploid cells may exist in two areas: the different chromosomes i. The aim of this study was to determine whether there are any size between X and Y spermatozoa and whether sperm size and shape varies between men. Identification of the Y and X inferred status of individual spermatozoa was carried out by polymerase chain reaction PCR , amplifying the putative testis-determining gene SRY together with a control gene ZP3. PCR amplification of out of Of normally-shaped but immobilized spermatozoa, Statistically, the length, perimeter and area of the sperm heads, and the length of the sperm necks and tails of X-bearing spermatozoa were significantly larger and longer than those of Y-bearing spermatozoa.
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In , the world's population reached seven billion people and it is predicted that this figure will rise above ten billion by the turn of the century. In order to meet the global food demand associated with this population growth, it will be necessary to utilise modern biotechnologies to promote the sustainable production of animals and agricultural resources. The FAO has recognised that production of pre-sexed livestock by sperm or embryo sexing, when combined with other biotechnologies, genomics, proteomics or phenomics, for example sperm-mediated gene transfer Kues et al.
Agricultural Biotechnology. Arie Altman. This work integrates basic biotechnological methodologies with up-to-date agricultural practices, offering solutions to specific agricultural needs and problems from plant and crop yield to animal husbandry.