New research finds that even though hens aren't terribly picky about their mates, they are picky about whose sperm makes it to the egg.
Plants & Animals
Aug 25, 2011
2
0
New analysis of the DNA sequence of the male-specific Y chromosomes from all living species of the great ape family helps to clarify our understanding of how this enigmatic chromosome evolved. A clearer picture of the evolution ...
Evolution
Oct 6, 2020
4
1035
If you are in a special relationship with another person, thank grandma - not just yours, but all grandmothers since humans evolved.
Social Sciences
Sep 7, 2015
10
937
Male Callosobruchus chinensis seed beetles have spines on their genitalia, which increase their fertilization success but injure a female's reproductive tract—especially a female of a related species called Callosobruchus ...
Evolution
May 19, 2015
0
101
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
0
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 ...
Mosquitoes are one of humanity's greatest nemeses, estimated to spread infections to nearly 700 million people per year and cause more than one million deaths.
Biotechnology
May 24, 2021
2
26
So-called 'selfish genes' may make females more promiscuous and also lower male fertility.
Plants & Animals
Feb 1, 2013
0
0
Fears that sex-linked chromosomes, such as the male Y chromosome, are doomed to extinction have been refuted in a new genetic study which examines the sex chromosomes of chickens.
Biotechnology
May 8, 2012
2
0
The Y chromosomes of cattle have more genes and are more active than the Y chromosomes of other primates, according to researchers.
Biotechnology
Jul 11, 2013
0
0
