What are the consequences? Learn more Your name Note Your email address is used only to let the recipient know who sent the email. The team then investigated a second prediction by David and Jean Zeh: that animals with placentas would diverge faster from one species into two.
This could explain why no modern man to date has been found with a Neanderthal Y chromosome. Retrieved October 7,
A significant QTL for female fertility, as measured by gravidity status with vs. The F 1 hybrid males and females were backcrossed with females and males of the parental populations, respectively, using wild-caught individuals or outbred F 1 or F 2 progeny. The stickleback fish family Gasterosteidae exhibits a rapid turnover of sex determination and sex chromosome systems, and thus their sex chromosomes are considered to be young Deviations from a sex ratio were examined using a binominal test with Bonferroni correction.
The hatching and larval survival rates were calculated based on the numbers of fertilized eggs and hatched eggs, respectively. The gonad index and fertility of males were examined as described above.
Your email only if you want to be contacted back. In Julythe Max Planck Institute for Evolutionary Anthropology and Life Sciences announced that they would sequence the Neanderthal genome over the next two years. Bibcode : NatCo Green et al.
External link. Many animals have evolved the ability to produce live young and many of these have evolved something like a placenta. Retrieved 5 July Retrieved May 31,