Can Maleness be considered a recessive trait ? Is the Y chromosome a deformity of the Female chromosome ?

Question

Not really interested in small talk. Thank you.

Answer 1

Maleness through the Y chromosome would be considered dominant, since the presence of the Y chromosome confers the trait of maleness.

Yes, the Y chromosome is probably a piece of what was once an X chromosome. However, it hasn't been an X chromosome in hundreds of millions of years. *shrug* It's useful enough that I wouldn't call it deformed.

Answer 2

Personally, I don't think that the X and Y chromosome behavior can be considered dominant or recessive. Their very action and interaction is different than any other chromosomes. A very easy example of this is sex linked genetics. Color blindness, hemophilia, male pattern baldness, and others I cannot even recall are related to the sex chromosomes.

In most other chromosomes, for a recessive gene like, say, Cystic Fibrosis to express itself there have to be two copies. In terms of sex-linked traits, however, in males there only needs to be one copy, the one on the x-chromosome. This is why color blindness is much more common in men than in women, it takes TWO x-chromosomes with the recessive gene in order for a woman to be colorblind.

For a while, it was believed that the Y chromosome was a withered X, but with the human genome project, we are finding there is really a lot more info in the Y chromosome despite it's smaller size. However, in the scenario of the sex-linked trait, males do not have that added buffer of a second gene to help shield them. In color-blindness, this is not as much of an issue at it seems at first (actually, in early man, it was likely a benefit to the hunters as men who are colorblind are better able to see hidden prey), but in more severe issues such as, say, some forms of muscular dystrophy, it is much more serious.

Answer 3

Dominant and recessive traits are when autosomal chromosomes express themselves.
X X is not dominant but gets two X one from each parent.
X Y also come from different parents.
Technically maleness is a "single chromosome " dependent and so is dominant.

Answer 4

If anything it would be the dominant trait. It takes one y-chromosome to make you male, whereas you have to have two x-chromosomes to be female.