a human male has one barr body in his nuclei. The chromosome constitution must be

All but one X-chromosomes in human female cells are condensed and inactive. Such X-chromosomes are known as .......

Which syndrome is expressed if a man has chromosome constitution 44 autosome and XXY ?

The human male is represented by sex chromosomes ----

Consider the following three statements related to the human male reproductive system and select the correct option stating which ones are true (T) and which ones are false (F). (i) Middle piece of spermatozoon is also termed as power house of spermatozoon. (ii) Vas deferens joins a duct from seminal vesicle and form vasa efferentia. (iii) Semen is a collection of secretions from the seminal vesicles, prostate gland and Cowper's glands and sperms from testes.

A women has an X-linked condition on one of her X-chromosomes. This chromosome can be inherited by :

In human, a .......... gene, present on the Y-chromosome influences the development of testes in the male.

Name and explain the surgical method advised to human males and females as a means of birth control. Mention its one advantage and one disadvantage.

An alloy of copper, silver and gold is found to have copper constituting the ccp lattice . If silver atoms occupy the edge centre and gold is present at body centre, the alloy has a formula :