An increase in the length of telomeres in human sperm compared to somatic cells has long been noted and considered within a popular hypothesis involving telomere shortening and cell aging. In the present study we determined telomere length in two species with long terminal TTAGGG arrays—bovine ...
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Head length of spermatozoa was measured using semen of White Leghorn, Creeper, Connecticut Random Bred, Jungle Fowl, White Wyandotte, New Hampshire and Dark Cornish cocks. Significant differences in mean length were found between breeds, but also within the group of Dark Cornish cocks. Mean length...
These conclusion relate to advantages conferred by size on sperm before fertilization; they do not affect the prediction of previous models that no component of sperm size should evolve for provisioning the zygote. 展开 关键词: GLOBAL CHANGE FOREST REGENERATION OSMOTIC ADJUSTMENT CELL WALL ELASTICITY ...
Accessory glands become depleted with repeated matings (Rogers et al., 2006), and the amount of sperm stored by a female is correlated to the testis size of the male that she mates with (Fry, 2006). A similar pattern of co-variation between male eyespan and the size of the testes ...
Cell length of the diatom Cylindrotheca closterium (Ehr.) Reimann & Lewin was investigated on a fortnightly basis from January to April 2000 in a hyperhaline pond (Sardinia, Mediterranean Sea) and relationships, with changes in temperature, salinity, and nitrite concentrations were assessed us...
A tiny fruit fly has the bizarre distinction of possessing the longest sperm of any animal—20 times the length of its own body and 1,000 times that of human sperm.
Thus, it is not possible to discriminate between the two classes of tardigrades on this basis. Literature and new data on eutardigrades also suggest that families or subfamilies cannot be discriminated on the basis of genome size. Nevertheless, genome size and sperm cell shape are correlated. ...
Fortunately, the assumption that absolute or relative brain sizes have a causal relationship to complex cognition in vertebrates has come under fire. Sperm Whales and Killer Whales possess the highest absolute brain size in the vertebrate class, reaching up to 9000g (Roth and Dicke, 2005;Ridgway ...
association of polymorphisms at the microrna binding site of the caprine kitlg 3′-utr with litter size open X An,Y Song,S Bu,... 被引量: 0发表: 2019年 Spam1 (PH-20) mutations and sperm dysfunction in mice with the Rb(6.16) or Rb(6.15) translocation Here we demonstrate that there...