Distribution and reproductive effects of Wolbachia i n stalk-eyed flies
... Wolbachia have been associated with female-biased sex ratio distortion, we used a PCR assay to examine 17 species of stalk-eyed flies (Diptera: Diopsidae), two of which exhibit femalebiased sex ratios, for the presence of these microbes. Type A Wolbachia was detected in four diopsid species, three f ...
... Wolbachia have been associated with female-biased sex ratio distortion, we used a PCR assay to examine 17 species of stalk-eyed flies (Diptera: Diopsidae), two of which exhibit femalebiased sex ratios, for the presence of these microbes. Type A Wolbachia was detected in four diopsid species, three f ...
Human Development
... • The effects that androgens have on the human body --virilization, masculinization, anabolism, etc. --- are not brought about by androgens themselves, but rather are the result of androgens bound to androgen receptors ...
... • The effects that androgens have on the human body --virilization, masculinization, anabolism, etc. --- are not brought about by androgens themselves, but rather are the result of androgens bound to androgen receptors ...
Chapter 16 Evolution of Sex
... Ultimately, asexual reproduction should take over. However, in nature this is not the case. Most organisms reproduce sexually and both sexual ...
... Ultimately, asexual reproduction should take over. However, in nature this is not the case. Most organisms reproduce sexually and both sexual ...
Animal responses to biotic environment
... individual survival. Parents invest lots of food and effort into them from egg stage to after birth, health of current generation risked for the next generation ...
... individual survival. Parents invest lots of food and effort into them from egg stage to after birth, health of current generation risked for the next generation ...
Structure of mating systems
... We can assume that the primary sex ratio in humans is 1:1. But we’d be wrong. The primary sex ratio is somewhere between 1.079 (1948 Carnagie Institute data) and 1.2-1.6:1. Why? One favorite explanation: Y-bearing sperm are lighter (Y is smaller than X) and more motile. The secondary sex ratio is 1. ...
... We can assume that the primary sex ratio in humans is 1:1. But we’d be wrong. The primary sex ratio is somewhere between 1.079 (1948 Carnagie Institute data) and 1.2-1.6:1. Why? One favorite explanation: Y-bearing sperm are lighter (Y is smaller than X) and more motile. The secondary sex ratio is 1. ...