Research reveals the genetic code behind non-identical twins
A QIMR Berghofer-led international team of scientists has unlocked the genetic secrets behind why some mothers are more likely than others to conceive twins.
Mar 14, 2024
0
33
A QIMR Berghofer-led international team of scientists has unlocked the genetic secrets behind why some mothers are more likely than others to conceive twins.
Mar 14, 2024
0
33
Alcohol use disorder (AUD) is associated with suicide mortality, with a similar association seen across the sexes, according to a review and meta-analysis published online March 12 in JAMA Network Open.
Mar 13, 2024
0
0
Among adolescents and young adults, mental health-related visits increased from 2006 to 2019, and the proportion with prescription of at least one psychotropic medication also increased significantly, according to a study ...
Mar 13, 2024
0
0
Given that 98% of mammals do not have periods, do you know why humans do?
Mar 13, 2024
0
1
Advances in technology in recent decades have obviated the need and desire for humans to move. Many of the world's population sit for long periods throughout the day, whether in front of a computer at work or in front of ...
Mar 12, 2024
0
0
Daughters inherit two X chromosomes (one from the mother and one from the father), while sons inherent an X chromosome only from the mother. In new research published in Molecular Cell, investigators at Massachusetts General ...
Mar 11, 2024
0
23
Female (♀) is the sex of an organism, or a part of an organism, which produces mobile ova (egg cells). The ova are defined as the larger gametes in a heterogamous reproduction system, while the smaller, usually motile gamete, the spermatozoon, is produced by the male. A female individual cannot reproduce sexually without access to the gametes of a male (an exception is parthenogenesis). Some organisms can reproduce both sexually and asexually.
There is no single genetic mechanism behind sex differences in different species and the existence of two sexes seems to have evolved multiple times independently in different evolutionary lineages. Other than the defining difference in the type of gamete produced, differences between males and females in one lineage cannot always be predicted by differences in another. The concept is not limited to animals; egg cells are produced by chytrids, diatoms, water moulds and land plants, among others. In land plants, female and male designate not only the egg- and sperm-producing organisms and structures, but also the structures of the sporophytes that give rise to male and female plants.
This text uses material from Wikipedia, licensed under CC BY-SA