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Yes, some animals do have chromosome 21.
Men typically have one X chromosome and one Y chromosome. Women typically have two X chromosomes. So-called XX males have two X chromosomes; thus they are genetically female but otherwise appear to be male.
Chromosome comparison is where the DNA of one species is compared to another. For instance, Scientists compare the remains of prehistoric animals to current organisms roaming the Earth in our modern day world.
No. The total number of chromosome pairs differs by Organism.
this is the process by which one of the two copies of the X-chromosomes present in female animals is inactivated
Yes, some animals do have chromosome 21.
Chromosome :)
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a hyena I suppose?
Maturity, I suppose.
I suppose you are meaning reptiles?
Many people hunt animals without permission, they do it for food, furniture and many other things! Just saying your not suppose to hunt animals without permission, in fact, your not suppose to hunt them at all!
Men typically have one X chromosome and one Y chromosome. Women typically have two X chromosomes. So-called XX males have two X chromosomes; thus they are genetically female but otherwise appear to be male.
I suppose if you don't care about the well-being of innocent animals then... nothing?
over 1,000,000 people have reported abused animals.
Same sex? most probably through wish of dominance (territorial) ie wanting to be in control, animals would eventually get along i would suppose.
Animals such as chameleons, lizards, snakes and insects, I don't know the specifics, however I suppose there are probably thousands of varieties of the types of animals I have listed, e.g. the brockleybank chameleon! I really hope this helps you in your quest:D xxx