The process through which a biological organism grows to maturity. In certain contexts it can mean the changes the organism goes through over its entire lifetime.
Questions tagged [development]
237 questions
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How is it determined in a zygote state of foetus, that which side is mouth and which side is for anus?
After the fertilization when the zygote is in the growing state to a foetus, the main canal is introduced first, from mouth to anus. But my question is when the canal is created first how does it determine which side is for mouth and which side is…
Demietra95
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How does an organism know when to stop growing, whether it is already on the outermost layer?
When a multicellular organism is under its development how does the current outermost layer of cells "know" that they should not divide furthermore, as their bodyplan coded into DNA is already achieved. Is it because of morphogens or something…
FloriOn
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Role of processing bodies in mammalian development
I am currently writing a project proposal for university admissions regarding the duration till which maternal mRNA is required for mammalian development. Till now all the literature I have read has data on P-bodies during oogenesis:-
1)…
Roni Saiba
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What would happen if there were no SOX9 in an XY human?
Would testes be produced? If SRY is functional, can it produce other proteins that can direct the production of testes, which may or may not be sterile?
user4863
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How Does the Body Know a Finger is Fully developed?
When a baby is being developed inside the womb,
1) how does the baby's body know a finger, or any other part of the body, has been fully developed?
2) following question, how does it "stop" the development of that part? What kind of signals are…
Carlo Santana
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Determination of animal and vegetal pole
How do we determine which is an animal pole and which is a vegetal pole in a zygote?
My professor said that the zygote can be divided into two hemispheres, vegetal and animal poles. The hemisphere with yolk is the vegetal pole and the one without is…
Tyto alba
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Why are children and adults so different?
In many animal species, juveniles aren't just smaller versions of adults. In mammals, the contrast is not as spectacular as in species that undergo metamorphosis, but still quite noticeable.
For example, puppies have shorter limbs and flatter faces…
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variance in zygotic gene expression across species
I found this review on the Maternal-to-Zygotic transition (MZT), describing how developmental control switches from maternally deposited RNAs to zygotic expression. I was struck by figure 1, and the apparent difference between viviparous and…
petersoapes
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Why are segments/parasegments in fruit fly embryos staggered?
I'm reading my developmental biology textbook and I don't understand this concept. I can see how concentrations of Eve and Ftz determine each parasegment. However, I don't understand why the length of one parasegment isn't equal to the length of one…
john
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How detachment/separation works in biology?
It might be a strange question, but I'm interested in the mechanics of separation/detachment during asexual reproduction, for example when an organism reproduces by budding (I don't mean cellular budding like baker's yeast). When the newly formed…
FloriOn
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Lack of yolk in mammalian oocytes as compared to other vertebrates?
Why do mammalian oocytes have little to no yolk? How does it compare to other vertebrates such as frogs, fish, and birds?
mesam22
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What is the germ layer origin of human lung fibroblasts?
What is the germ layer origin of human lung-derived fibroblasts?
user391339
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