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They are different species. If they could mate to produce fertile offspring, they wouldn't have separate names.
Heterosexual
A bulldog is a dog and can mate a dog to produce offspring .
A species.
A group of organisms that can mate and produce offspring which can themselves mate is called a species.
A group of organisms that can mate and produce offspring which can themselves mate is called a species.
noducks and geese, although able to breed, are unable to produce offspring due to different chromosome numbers (same species and interbreedable species have the same number of chromosomes, this produces viable, fertile offspring).basically what you have between your duck and geese is the very common species barrier, rendering it impossible for the duck and geese to have offspring, but it is not impossible for them to mate.Another thing, having experience with this myself, except it was a duck and a pelican, the duck will lay eggs, that's what they do, they've mated and figure they should, but none of the eggs will be fertilized unless another boy duck snuck in one night.A horse and donkey can gowever. Horses and donkeys can interbreed to form a mule, but the mule has an odd number of chromosomes. Horses have 64 chromosomes, giving 32 in a gamete to a mule, whereas donkeys have 62 chromosomes, giving 31 in a gamete to a mule.The thing that keeps mules from reproducing is the fact that they have 63 chromosomes and are therefore incapable of making gametes (sex chromosomes that have half the chromosome count) because 63 is not evenly divided by 2. they can mate just fine, but they cannot create viable sex cells (eggs and sperm). Some also believe that this hybrid cross is infertile because the chromosomes line up incorrectly, completely stopping the spermatogenesis process (the process that creates sperm).
Zygote
development
development
To produce offspring; if they didn't mate the species would die out.
Species