` Human Sexual dimorphism as its basic element of identity is genetically determined and determines the natural path of social development and cultural heritage. Complementarity of the morphological phenotype characteristics and behavioral of the men and women is part of the genetic program of human nature-oriented implementation of the basic tasks to fulfill in life, which is to have offspring, which in turn is, related to its fertility. This consists of the ability to produce germ cells, the possibility of the woman 's body and a man to accomodate procreation by meeting an egg with sperm accomplished with entering information in the matter of the genetic ancestors of the new life of a human being. The next step is to secure …show more content…
Sperm containing the Y chromosome with a properly functioning SRY gene determines male gender, and if contains the genetic material of the X chromosome is shaped female.
The presence of the SRY gene is the basic criterion of gender gene in humans. Discovered in 1990 by a group of P. Goodfellow from the University of Cambridge ,SRY gene is called the "central switch of the masculinity" and is located on the short arm of the Y chromosome locus …show more content…
Male rats were divided into two groups. One of them was applied cocaine and the second control group was treated with saline for 60 days. Males were paired with females, who have never had contact with cocaine. The rats immediately after the mating and fertilization wer separated to eliminate the possibility of influencing the behavior of rats on pregnancy. Sequentially offspring of rats were subjected to careful observation, to determine whether the same will apply themselves cocaine, which was offered to them. It turned out that the offspring, but only male rats were addicted to cocaine ,needed more time to learn how to administer a drug, and were taking much lower doses compared with the offspring of the control group. In addition, animals in the control group tend to work much harder to get a single dose of cocaine when compared to addicted young rats On this basis it was concluded that there is a reduction of rewarding effect of cocaine in the offspring of rats addicted to the