Question

briefly explain how an individual human can express the following traits:  46 chromosomes, a sex chromosome complement of XX, two testes, and normal male genitalia.?

Answer 1

In humans, 46 chromosomes are present in which males have 44 + XY and females have 44 + XX.

So, the male has only one X chromosome and one Y chromosome.

In the females two copies of X chromosome are present they do not contain Y chromosome.

To maintain the gene expression ( similar to males) which are processed by X chromosome, female system block the expression of one X chromosome and do not transcribe genes from this X chromosome.

Only one X chromosome of female is working which exhibits transcription and process proteins formation. Malel already have one X chromosome which is properly functional and another Y chromosome which is also functioning for male characters.

So by the activity of female X chromosome inactivation both male and females of human maintains the productivity of X chromosome.

Overall male do not have any role to maintain quantity of products produced by female X chromosome only female can regulate or maintain dosage compensation as compared to male.

Thanks.