A unique study from Lund University in Sweden has discovered for the first time that there is a genetic sexual conflict in the immune system in animals. In females, the variation in central genes of the immune system is too ...
Plants & Animals
Aug 3, 2018
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178
Most of us know that our biological sex is decided by the pairing of X and Y chromosomes during conception.
Ecology
Apr 24, 2018
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128
Quality sperm, good genes, and courtship knowledge are just a few reasons why females might benefit from mating with older males.
Plants & Animals
Jan 25, 2018
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225
(Phys.org)—An international team of researchers has conducted an extensive study of male fertility and aging and has found evidence of older fathers producing less fertile offspring than younger fathers. In their paper ...
New research suggests that male chimpanzees are more invested in protecting their own offspring than previously thought. Researchers found male chimpanzees spend time with non-mating female chimpanzees that are caring for ...
Plants & Animals
Nov 10, 2016
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49
There is new evidence that the "mother's curse" - the possibility that moms may transmit genes to their children that harm their sons but not their daughters - holds true in animals.
Biotechnology
Aug 2, 2016
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1166
(Phys.org)—A female cichlid hybrid fish has been observed to have grown male reproductive organs, impregnate itself and then to have offspring, a team of researchers in the U.K. are reporting in a paper published in the ...
Some mountain gorilla females linger into adulthood in the group into which they were born. In the process they also remain in the company of their father, who is often their group's dominant male. To curb inbreeding, though, ...
Plants & Animals
May 20, 2015
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58
Studies into male birds that produce offspring well into their old age could deepen concerns over the trend for delaying parenthood until later in life, for both men and women.
Plants & Animals
Feb 4, 2015
0
33
Previous research has shown that infanticide by males is widespread in many mammal species, but most commonly occurs in those species where females live in social groups dominated by one or a few males.
Plants & Animals
Nov 13, 2014
0
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