Have you ever seen a <span title="hamstephantiraffeippoigion?">hamstephantiraffeippoigio...</span> <span title="Hamster+elephant+giraffe+hippo+pig+lion(pics">Hamster+elephant+giraffe+...</span> included)?

Question

or have you seen a hiprab?hippo+Crab

http://www.funnyphotos.net.au/userimages/user756_1164934380.jpg

or a cark?Cat+Shark

http://i91.photobucket.com/albums/k313/joemurphthesurf/mixed_animals_07.jpg

or a pog?Panda+Hog

http://i91.photobucket.com/albums/k313/joemurphthesurf/mixed_animals_07.jpg

or a randa?Panda+Rino

http://www.joelapompe.net/wp-content/uploads/2007/12/panda2004.jpg

... Well have you?

Answer 1

Cool! But nope.

Here are 8 reasons called reproductive constraints that will not allow the production of a fertile offspring between 2 different species. These factors can be classified as prezygotic (constraint that makes mating difficult) and postzygotic (constraint that prevents a zygote from developing).

Prezygotic Constraints:

1. Habitat Isolation. Two species may live in the same area but in different habitats. Living in these different habitats ( in water, living on land, or living in tree tops) effectively segregate these organisms from each other. Since there is little if any contact the possibility of successfully mating is drastically reduced.

2. Temporal Isolation. Two species that breed at different times of the day, season, or year cannot mix their gametes. Since the breeding times are different there is no chance of reproductive contact.

3. Behavioral Isolation. Species-specific signals and elaborate behavioral patterns are used by closely related species to insure contact with the proper mate. Birds, mammals, and insects have pre-mating rituals that attract the proper mate. These signals can be chemical or physical in nature. Other organisms pay little or no attention to these behaviors or scents.

4. Mechanical Isolation. Anatomical incompatibility may prevent sperm transfer between two closely related species. The absence of certain appendages or their modification may inhibit a male from grasping and successfully fertilizing the female. Difference in floral structure may prevent pollen from reaching the stigma of the intended flower.

5. Gametic Isolation. If for some reason foreign sperm is introduced into a female there are several preventative measures to insure that there is no union between the sperm and egg. Internal environmental conditions may cause the sperm to die. Gamete recognition sites on the sperm do not fit with the intended egg. If the two species differ in the type of fertilization (external and internal) there is no chance of the sperm ever contacting the egg.

Postzygotic Constraints: If prezygotic constraints are crossed and a hybrid zygote forms, one of several constraints will prevent development of a viable, fertile hybrid.

1. Reduced Hybrid Viability. Genetic incompatibilities between the species may abort the development of the hybrid during some stage of development. Difference in chromosome number may cause abnormal cell division. Since the chromosomes align to insure equal distribution upon cytokinesis, abnormal chromosome counts could occur based on this numerical difference.

2. Reduced Hybrid Fertility. If two species mate and produce a viable offspring, these offspring will be sterile due to the misalignment of the chromosome number. During gametogenesis the odd number of chromosomes makes it impossible for viable gametes to be produced by meiosis.

3. Hybrid Breakdown. In some cases a fertile hybrid is produced. When these hybrids mate with each other, their offspring of the next generation are feeble or sterile.

http://www.newton.dep.anl.gov/askasci/bi...

Answer 2

Yes, I&#039;ve seen all of these down by the bay where the watermelons grow.

Answer 3

Not till now and this took some thought and its not real funny either but have to give credit where do someone though of it so guess that makes them different  Whats next????

Answer 4

That&#039;s some sick photo editing!