Tuesday, January 8

Z is for Zygote.

My ABC based on the Nesbitt chickens has now reached Z. Some science is called for!


In nature, living things evolve through changes in their DNA. In an animal like a chicken, DNA from a male sperm cell and a female ovum meet and combine to form a zygote -- the first cell of a new baby chicken. This first cell divides innumerable times to form all of the cells of the complete animal. In any animal, every cell contains exactly the same DNA, and that DNA comes from the zygote. Chickens evolved from non-chickens through small changes caused by the mixing of male and female DNA or by mutations to the DNA that produced the zygote. These changes and mutations only have an effect at the point where a new zygote is created. That is, two non-chickens mated and the DNA in their new zygote contained the mutation(s) that produced the first true chicken. That one zygote cell divided to produce the first true chicken. Prior to that first true chicken zygote, there were only non-chickens. The zygote cell is the only place where DNA mutations could produce a new animal, and the zygote cell is housed in the chicken's egg

Next week ABC enters Round 12.
 My theme this time is Bing...watch this space!

12 comments:

  1. So, the mystery is solved. The egg came first.

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  2. this was eggcelent.

    ROG, ABC Wednesday team

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  3. So sorry to have the Chicken ABC come to an end (you know how much I love your chickens) but I can't wait for the Bing ABC.

    cheers, parsnip

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  4. I echo "angryparsnip" in that I'm so excited for the Bing ABC! We just today phoned the kennel we want to deal with re a lab puppy!

    Leslie
    abcw team

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  5. You have almost blinded me with science today Denise.
    What a pity that pup was not called Zing - that would have been so much easier.

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  6. My mum used to hatch her own eggs. Can't remember how many days. She shines the torch to look for "eyes". Those has the Zygote, she puts it back to the hen.

    Then she goes downstairs to the outside, 2 bowls, she cracks into it. The good ones , she cooks them with wine. Only she eats it, we go eeeeee!( The parallel I guess is the Filipino Pulut) if one the occasion, one gives off the PONG so vile even the dog runs away. She quickly drops it in the other bowl to bury.

    My most memorable story about shoes, when I finished high school, one girl friend went to another with her brand new shoes. There was a young puppy. The end result, no more friends. The injured party said, the mum didn't even offer to replace the shoe.

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  7. Phew... that was zygotic! Lol!
    Thank you for all that information!

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  8. what does a nonchicken look like? :) This sure sounds like a zygotic experience!
    BTW, being a newbie does each Round start with the first letter of the alphabet - or some other way? What letter will be next week?

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  9. Very creative and unique post for 'Z' ~ Wonderful.

    Thanks so much for being the founder of this ABC blog ~ so enjoy it.

    (A Creative Harbor) aka ArtMuseDog and Carol ^_^

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  10. thanks for visiting my blog today. I have really enjoyed this series of ABC and tried to do each one!! An egg is an excellent thing when you study it!! have a great week. Cheers.

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  11. I disagree - the two non-chickens mated to produce the first chicken, so there could not have been an egg first. Not a chicken egg anyway. Ergo, the chicken came first!

    So, you've reached 'Z' again? Hmm. I'll have to think about whether I want to join in the new round next week!

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Thank you for your comments, always nice to know somebody has taken the time to let me know what they think.

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