Answer: There are 23 pairs of chromosomes in the cell, or 46 total. 1 pairof them are sex chromosomes and the rest are called autosomes.There are 50-75 trillion cells in the human body. That means thereare about 1,550,000,000,000,000- 1,725,000,000,000,000 pairs ofchromosomes in the human body.
The sex chromosomes in human, denoted X and Y, are only truly apair in females (XX). So some people consider humans to all have 22pairs chromosomes and 2 sex chromosomes.
Answer: its usually because they are attracted ro the same sex so to make it easier on themselves they change to their opposite sex to get a better chance with their old same sex person..................................yeah buh- bye
This answer is so wrong that it is funny....the ignorance of the person who answered it is really in question. BTW, Downs Syndrome is caused by a genetic defect of the subject having one extra chromosome.
The lower sperm counts or lower production of the Ova sometimes will effect the ability to have children
I believe that this is a repeat of a question,,,,it has been posted several times with nearly identical wording.