All Questions
18 questions
0
votes
0
answers
30
views
Brain evolution in the age of the caesarian
I have just been reading an account of the evolution of human intelligence in Matthew Syed’s recent book on diversity, called “Rebel Minds”.
He is not the originator of this idea, but he suggests ...
- 101
1
vote
0
answers
52
views
Does intelligence depend more on environment than on genetic factors? [duplicate]
Many have argued that the test of IQ is simply a test of language. The application of the test consists of asking a number of questions. The person should understand the question presented to them and ...
- 11
-4
votes
2
answers
883
views
Why isn't the human zygote considered a human life how is a living anatomically modern human defined biologically? [closed]
It has 46 chromosomes by default when healthy(Differences almost always are pathological) and has almost every biological functions, processes a Newborn or and Adult person has.
It even invades ...
- 137
0
votes
2
answers
70
views
Does low gravity exposure to early stages of human fetus have potential to unloc unused genetic information from earlier stages of evolution?
The title seems quite self explanatory but let me elaborate.
New mutations do take a very long time and many generations to occure in the genetic code. But our genetic code already holds all the ...
-1
votes
1
answer
70
views
Will our biological bodies be changed after we’ve occupied and settled Mars? [closed]
I had this question in mind for very long time, and I could not find a clear answer on the Internet, so I was hoping that you might know the answer.
If we will bring life to planet Mars and a few ...
- 117
-1
votes
1
answer
59
views
Neuroscience - A neuron with two types of synapses (electrical and chemical) at the same time
I learn that the nerves from the Peripheral Nervous System can carry signals from and to other organs of the body.
I'm wondering if A Single Nerve carries
1) Only chemical signals
2) Only physical ...
- 133
0
votes
1
answer
32
views
What are some features that do not make an individual better than others without this feature? [closed]
If a mutation occurs so that this allele gives a noticeable feature that is present in this individual but absent in every other individual and this feature is of no benefit or detriment to the ...
- 3
1
vote
0
answers
43
views
Facial uniqueness of some animals of the same species [duplicate]
Do birds of the same species ,such as each pigeon that we see in cities, have unique facial geometries (facial phenotypes) regardless of their feather ,colors, spots etc? Sometimes it is almost ...
- 11
1
vote
0
answers
22
views
What is the difference between average sperm epimutations and intersection sperm epimutations, in the context of the attached article?
The paper of interest is Manikkam et al. (2014).
In research for a school Year 10 Science project, I came upon this article and the following two graphics. I don’t quite understand the difference ...
- 21
4
votes
0
answers
185
views
Why do female humans invest more in parental care than male humans, from an evolutionary standpoint? [closed]
As the question title suggests, why do female humans invest more in parental care than male humans, from an evolutionary standpoint?
My guess is that the crux of this that males and females have ...
2
votes
1
answer
178
views
Why are there still useless traits/mutations in our body [duplicate]
Why is it that through decades of evolution , some seemingly useless body traits such as earlobes and pubic/chest hair still remains while other traits are generally replaced through evolution?
- 187
9
votes
2
answers
13k
views
Why babies cry after they are born?
Well I have noticed that almost all of the babies cry after birth, but some of them (1 to 1,000,000? births) don't cry. So, we have:
Why is this happening (the cry after birth)?
Also why animals ...
- 667
2
votes
1
answer
559
views
Is sex linked inheritance independent of dominance?
I have a little challenge with what my lecturer said in class. I disagree with explanation but don't know how to convince myself. Please review and tell me your opinion.
Eye-color in drosophila is a ...
- 21
0
votes
0
answers
128
views
Is there an evolutionary advantage associated with migraine? [duplicate]
I have read Wikipedia article on Genetics of migraine headaches and I don't buy it
Because genetics influence susceptibility to migraine, it can be
shaped by evolution. Fitness-impairing ...
3
votes
2
answers
2k
views
Crossing over and exon shuffling?
Campbell Biology 10e, in discussing the functions of introns, writes:
The presence of introns in a gene may facilitate the evolution of new and potentially beneficial proteins as a result of a ...
- 1,953
2
votes
1
answer
647
views
List of heritability estimates in humans?
Many people on this site ask questions that directly or indirectly have to do with heritability in human.
Do you know a list of estimates of heritability of various traits in humans? Or could you try ...
- 68.3k
-2
votes
4
answers
460
views
Are biological systems engineered? They are often reverse engineered at a molecular level!! [closed]
Understanding biological systems, molecular biologists need to “reverse engineer” them. Is this evidence that the systems were engineered to begin with?
- 37
17
votes
4
answers
7k
views
Can two humans with 44 chromosomes produce viable offspring?
It is known that there are very few individuals having 44 chromosomes, not the usual 46 chromosomes.
One example is a male in China: the first article, the second article.
The other is a female in ...
- 561