why are their almost as many males as females?

[Mookow]

Originally posted by: matt426malm
becuase start out with y chromosome. 50/50 chance additional y or x. yy=female yx =male. more women becuase of life expactancy right?

well, women have XX, men have XY, and the rest of your post isnt making sense.

 

[matt426malm]

Originally posted by: Mookow

Originally posted by: matt426malm
becuase start out with y chromosome. 50/50 chance additional y or x. yy=female yx =male. more women becuase of life expactancy right?

well, women have XX, men have XY, and the rest of your post isnt making sense.

thats right I got em switched

 

[Mookow]

Originally posted by: Schadenfroh
ok look at the facts, 1 guy could impragnate a whole lot of women in short period of time, wheras a woman can only be impregnated only about once a year. therefore, in theory, women should outnumber men for this sake. also, most people who fight in wars are males and the untold millions (or possibly billions) that have died in conflict thruought history have mostly been males, so why dont females outnumber males by a large margin?

In the current hunter/gatherer theory, men hunted, women gathered food. You think you could kill a deer every other day with a spear? Because you'd need to be able to do that to support 9 women and a bunch of kids, even if the women and kids were doing pretty well collecting fruit, nuts, roots, berries, etc.

 

[Schadenfroh]

ok, so the reason that humans came to be 50/50 is because of the need of males to hunt food. that explains the first part of the question. I did not think of wars being so isolated but i guess if you look at the big picture then i guess that is true that it does not affect male/female ratios as much. Females do have a longer life expectancy, but is this due to on average women not doing as hard as physical labour as males or they genetically inclined to live longer? also, what percentage is the worlds male/female ratio

EDIT: BTW, i was not asking earlier about the babys being born, i was asking about why humans evolved/created to be 50/50, im not questioning the way it is, im questioning why it is that way

 

[StageLeft]

ok look at the facts, 1 guy could impragnate a whole lot of women in short period of time, wheras a woman can only be impregnated only about once a year

That...just...doesn't...make...sense.

No, the previous statement makes sense. If one male can impregnate many females, there should be more females... that's according to some weird natural law...

It doesn't make sense if about 50% of births are male, because all that means is that the male is producing a lot more CHILDREN, not necessarily male ones.

Anyway, in countries like china the girl babies get thrown in a dumpster sometimes!

Females do have a longer life expectancy, but is this due to on average women not doing as hard as physical labour as males or they genetically inclined to live longer? also, what percentage is the worlds male/female ratio

probably mainly stress, and the liklihood of males to engage in high risk activites, which brings down the number. In regards to world ratio I'm not sure, but in most countires I've looked at, it's always within a couple of percent either way.

 

[MAME]

world population: 52% female, 48% male

the odds of a having a boy/girl is about the same. IT DOESN'T MATTER IF 1 GUY CAN IMPREGNANTE 0932840942834 GIRLS, IT'S STILL 50/50 YOU MORON

 

[Schadenfroh]

Originally posted by: MAME

the odds of a having a boy/girl is about the same. IT DOESN'T MATTER IF 1 GUY CAN IMPREGNANTE 0932840942834 GIRLS, IT'S STILL 50/50 YOU MORON

you just dont get what i was asking do you?

 

[ReiAyanami]

there are 104 males for every 100 females born. however women live 4-6% longer lives so it "balances out"

however that means for every man to marry, the woman would be older (ashton kutcher/demi moore style relationship) and the population growth is a must. otherwise u'll end up like bejing where men outnumber women by upto 20%

 

[Rakkis]

Man.... there is some weird logic going around tonight.

The ratio is ~1:1 because of genetics. Any deviations are tiny and trivial.

Let us start small and go bigger.

1) For each single birth:
There is a ~50% of being male or female. This is determined genetically since we can only be XX (female) or XY (male)*. This is due to the random way the male chromomes are distributed when sperm is made. Half of it has an X chromosome.. and half is Y.

special consideration: when talking energetics at the cellular level, a sperm cell with a Y chromosome (smaller) tends to be swifter, swim faster, require less energy than its X(bigger chromosome, "heavier", takes more energy to support) counterpart.

Hence, at BIRTH, there is a TINY leaning towards having more males.

2) Environmentally speaking:

Putting the whole "all people are equal" stuff aside, GENERALLY, men work and support women. We're also bigger. Consequently, we put more "mileage" into our bodies and we tend to give out faster. Hence, women tend to live longer than men on average.

This tilts the balance in favor of having more women.


Special deviations like war, diseases, death at child birth, energetic cost of producing an infant, etc will affect the balance one way or the other. However the cummulative effects are barely big enough to not be negligible.

As some have mentioned before, women outnumber menby a couple percentage points. This is mainly due to the simple fact that men work (as in burn through calories and put strain in their bodies) more than women do.**


*There are of course cases where XXY, XYY, etc happen, but these cases are so few that for our purposes they can be excluded.
**Please, no feminist comments. This is true on a global scale as well as locally. I don't mean "brain work" or management types. I mean hard labor, farming, etc which is how most of the world gets by

 

[Schadenfroh]

Originally posted by: Rakkis
Man.... there is some weird logic going around tonight.

The ratio is ~1:1 because of genetics. Any deviations are tiny and trivial.

Let us start small and go bigger.

1) For each single birth:
There is a ~50% of being male or female. This is determined genetically since we can only be XX (female) or XY (male)*. This is due to the random way the male chromomes are distributed when sperm is made. Half of it has an X chromosome.. and half is Y.

special consideration: when talking energetics at the cellular level, a sperm cell with a Y chromosome (smaller) tends to be swifter, swim faster, require less energy than its X(bigger chromosome, "heavier", takes more energy to support) counterpart.

Hence, at BIRTH, there is a TINY leaning towards having more males.

but also, the male sperm are more susecptable to the acidity of the females body and at certain times of the month, when the acidity is higher, are unable to perform as well, thus increasing the chances of females on those days

 

[TitanDiddly]

Oh MAN that logic sucks. Once impregnated, a female has about a 50/50 chance of boy/girl. Once all the females are impregnated/don't want to be, then there's just no sechs for a while until the ladies reload.

 

[Evadman]

Originally posted by: Schadenfroh
but also, the male sperm are more susecptable to the acidity of the females body and at certain times of the month, when the acidity is higher, are unable to perform as well, thus increasing the chances of females on those days

So, if a female were to impregnate another female, the acidity would not be an issue?

Do you have ANY idea about which you speak? Maybe you came here from another planet. Ya, that must be it.

Earth to Schadenfroh! Please ask your parents. If they are as dumbfounded as you, please ask your health teacher. Same goes for the rest of the mentaly handicapped people posting in this thread.

 

[cerebusPu]

Originally posted by: Evadman

Originally posted by: Schadenfroh
but also, the male sperm are more susecptable to the acidity of the females body and at certain times of the month, when the acidity is higher, are unable to perform as well, thus increasing the chances of females on those days

So, if a female were to impregnate another female, the acidity would not be an issue?

Do you have ANY idea about which you speak? Maybe you came here from another planet. Ya, that must be it.

Earth to Schadenfroh! Please ask your parents. If they are as dumbfounded as you, please ask your health teacher. Same goes for the rest of the mentaly handicapped people posting in this thread.

so if the sperm doesnt make it to the egg then becomes a female?? ehh....dont think so. the sperm carries the X or Y chromosome which pairs up with the X chromosome in the egg to make either males or females.

if males created sperm with unequal amounts of X and Y then there will be different ratios of males and females.

but if you look further back and look at how sperm is created (that is meiosis) you can see why there's 50% chance male or female.

http://www.google.com/search?q=meiosis&hl=en&lr=&ie=UTF-8&oe=UTF-8

Near the final stages of meiosis the 4 haploid (half number chromosome cells) are formed, where half the genetic material is each cells. Since males have X and Y chromosomes, their sperm cells will be equal amounts of X and Y sperm types.

From this logic, if males have XYY then we would have twice as many males then females. If males had XXY, we would have twice as many females than males. But because males carry XY chromosomes, we have same number as females and males all the time.

I hope this makes sense. Im not a biology major so I may not be entirely correct.

 

[cerebusPu]

Originally posted by: Schadenfroh

Originally posted by: MAME

the odds of a having a boy/girl is about the same. IT DOESN'T MATTER IF 1 GUY CAN IMPREGNANTE 0932840942834 GIRLS, IT'S STILL 50/50 YOU MORON

you just dont get what i was asking do you?

I think you dont get what we are saying Schadenfroh.

 

[tikwanleap]

Evolution is all about survival until reproduction.

Does one guy with many women increase the offsprings' chances of survival and to be able to reproduce?

If, somehow, there are conditions over a long period of time that this is so, then naturally there will be evolutionary pressures to tend towards this characteristic in the human species.

At this point in time, the male sperm either has an X or Y chromosome and that causes the chances of the child being a boy or a girl to be 50:50. This is probably because that is the way it has always been, and there weren't enough evolutionary advantages for this ratio to be otherwise.

On the other hand, there ARE many examples of certain species of insects, reptiles and fish that do have unequal male to female ratios.

Look at bees and ants. The queen and the drones are all female and males are only created for reproduction.

 

[Siddhartha]

WTF are they teaching in high school biology?

1. The typical male produces almost an equal number of sperm with a X chromosome and sperm with a Y chromosome.
2. A woman produces eggs with a X chromosome.
3.
a. A female zygote is produced if a sperm with a X chromosome impregnates a woman.
b. A male zygote is produced if a sperm with a Y chromosome impregnates a woman.

So within reason it does not how many women are impregnated by the same man.

 

[Savij]

Take a moment and think about it. A guy can get 50 girls pregnant, but the child will have a better chance of survival if both parents are taking care of it. Human reproduction requires a major investment in time and resources so even one lost child would be a major loss (time and resource wise). 1 guy can get 50 women pregnant but it does no good to the species if only 1/50 survive. If 1/50 survive, it would be far less in the next generation than if there and been 25 men and 25 women and they had 25 children that survived.

Basically a human child is expensive prospect and having 2 fulltime parents assures a higher return rate on the investment.

 

[Savij]

am I the only one that took his question to be "why did humans evolve to produce 50/50 males and females" instead of what everyone else seems to be answering, "what cause men and women to be born in equal numbers"

 

[msarusac]

Originally posted by: Schadenfroh



but also, the male sperm are more susecptable to the acidity of the females body and at certain times of the month, when the acidity is higher, are unable to perform as well, thus increasing the chances of females on those days

hahaha....that's the funniest thing I've read all day....thanks for the laugh...

 

[MAME]

Originally posted by: cerebusPu

Originally posted by: Schadenfroh

Originally posted by: MAME

the odds of a having a boy/girl is about the same. IT DOESN'T MATTER IF 1 GUY CAN IMPREGNANTE 0932840942834 GIRLS, IT'S STILL 50/50 YOU MORON

you just dont get what i was asking do you?

I think you dont get what we are saying Schadenfroh.

Yeah, seriously. Please, never breed Schadenfroh...that's all we ask for

 

[0roo0roo]

losing women affects population. losing men doesn't so much. a woman can only have a finite, time limited, spaced number of pregnancies. one man can service a great many women. a society can get by with some single mothers.

 

[Schadenfroh]

Originally posted by: MAME

Originally posted by: cerebusPu

Originally posted by: Schadenfroh

Originally posted by: MAME

the odds of a having a boy/girl is about the same. IT DOESN'T MATTER IF 1 GUY CAN IMPREGNANTE 0932840942834 GIRLS, IT'S STILL 50/50 YOU MORON

you just dont get what i was asking do you?

I think you dont get what we are saying Schadenfroh.

Yeah, seriously. Please, never breed Schadenfroh...that's all we ask for

I know its a 50/50 shot, moron, everyone knows that, what i was asking was why humans evolved/created to be a 50/50 shot instead of a secenerio that favors more females than males which has been answered, more males were needed for hunting etc., (I FVKING KNOW THAT THE MALE SUPPLIERS THE X OR THE Y CORMOSOME THAT DETERMANES SEX and the chances are 50/50, GET IT THRU YOUR THICK MINDS THAT I KNOW THIS CRAP, EVERYONE DOES)

Savij is the only one that understood my question

 

[Schadenfroh]

Originally posted by: msarusac

Originally posted by: Schadenfroh



but also, the male sperm are more susecptable to the acidity of the females body and at certain times of the month, when the acidity is higher, are unable to perform as well, thus increasing the chances of females on those days

hahaha....that's the funniest thing I've read all day....thanks for the laugh...

my biology teacher talked about this last week, its in my notes

 

[geno]

Originally posted by: Schadenfroh

Originally posted by: msarusac

Originally posted by: Schadenfroh



but also, the male sperm are more susecptable to the acidity of the females body and at certain times of the month, when the acidity is higher, are unable to perform as well, thus increasing the chances of females on those days

hahaha....that's the funniest thing I've read all day....thanks for the laugh...

my biology teacher talked about this last week, its in my notes

I don't know if what was said is true or not, but just because your biology teacher said it doesn't make it right.

 

[Eli]

Originally posted by: geno

Originally posted by: Schadenfroh

Originally posted by: msarusac

Originally posted by: Schadenfroh



but also, the male sperm are more susecptable to the acidity of the females body and at certain times of the month, when the acidity is higher, are unable to perform as well, thus increasing the chances of females on those days

hahaha....that's the funniest thing I've read all day....thanks for the laugh...

my biology teacher talked about this last week, its in my notes

I don't know if what was said is true or not, but just because your biology teacher said it doesn't make it right.

Indeed.

It's a pretty studied field though. There are several books out on how to choose the sex of your baby through "natural" methods.

It's not far fetched. It's not like we know everything about the human body.