humans sex

Sex Determination - During the formation of gametes, the females will have only one type of gametes, all with one X chromosome. However, the males will produce two types of gametes or sperms, half with X chromosome and half with Y chromosome. Thus the sex of a zygote is determin..

From the above observations of production of different traits, it is clear that in sexual reproduction, the genetic materials from the two sexes participating are different from each other. All human chromosomes are not paired similarly, the sex chromosomes in men is ..

As can be seen from the human karyogram, the chromosomes are classified into two types, autosomes and sex chromosomes. The autosomes have homologous chromosomes as pairs whereas the sex chromosomes are of two different types - X and Y. A female has two X-chromosomes a..

In human beings, sexual reproduction takes place. Sexes are separate and hence they are known to exhibit sexual dimporphism. Males have sex organs called the tetes while the females have sex organs called the ovaries. Even in the external appearance, ma..

Human Reproductive System - The human beings are bisexual with two separate sexes - male and female. The individuals of the two sexes show distinctive features called the secondary sexual characteristics . Some of the male secondary sexual characteristics are..

The human beings are bisexual with two separate sexes - male and female. The individuals of the two sexes show distinctive features called the secondary sexual characteristics . Some of the male secondary sexual characteristics are facial hair, cracking of voice, etc. ..

Human Hereditary Traits - Inheritance in man conforms to the same genetic principles, which govern inheritance in other animals and in plants. About 200 traits are transmitted from generation to generation in humans. These are called hereditary traits. These include dominant as ..

Inheritance in man conforms to the same genetic principles, which govern inheritance in other animals and in plants. About 200 traits are transmitted from generation to generation in humans. These are called hereditary traits. These include dominant as well as recessive traits. Many ..

In human beings, sexual reproduction takes place. Sexes are separate and hence they are known to exhibit sexual dimporphism. Males have sex organs called the tetes while the females have sex organs called the ovaries. Even in the external appearance, males an..

Summary - Asia has 60% of global population and continues to dominate the global population in next 50 years. Some countries in Europe have negative or zero growth of population. In India, U.P is a populous state but density of population is highest in West Bengal, literacy rate and sex r..