Is the male lineage going to be extinct?

Question

because the Y chromosome is getting shorter and shorter? Or will the male lineage is going to be extinct at all?

Answer 1

Yes, deleterious mutations that are not selected out by crossing over are slowly taking over the Y chromosome. They figure about 200, 000 years until total destruction of this chromosome.
The good news is that the sex determining region, SRY, is found on what would be somatic chromosomes in some other organism that may have lost their Y chromosomes. The SRY region migrated! I think in the length of time remaining to the Y chromosome we will think of something.

In the popularization by the geneticists, Byran Sykes, called " Adams Curse ", this phenomenon is discussed in length.

Answer 2

The male lineage cannot become extinct unless we completely stop reproducing through sex. Even if we came up with some kind of technological alternative, men couldn't become extinct unless a) 100% of people wanted female children - this is unlikely since in a lot of countries boys are preferred, AND b) 100% of children were created through the technological alternative.

Y chromosomes are pretty stable though there are variations and the occasional mutation. There is NO evidence it is getting "shorter and shorter" - don't know where you heard that, but it wasn't from a scientific source. Evolutionary biologists studying human lineages use the Y chromosome DNA to trace ancestry and relationships between populations that split apart thousands of years ago. For example, Australian aborigines are thought to have arrived in Australia about 50,000 years ago, and saw few other people until the 1700's. This population has specific genetic markers on the Y chromosome, so do others.

Answer 3

I can't imagine why males would become extinct. It has been shown that sexual reproduction produces the variation that is necessary for populations to survive environmental changes.