a friend of ours said that when a mother becomes pregnant the baby inside her have the gender of a woman and as the foetus grows the sex will develop into either male or female.
2006-06-20 02:04:34 · 16 answers · asked by Pirata27 1 in Pregnancy & Parenting ➔ Pregnancy
This is a misunderstanding of the true facts. When a baby is conceived, it receives its genes from both parents. There are 23 pairs of chromosomes; pair #23 is called the sex chromosomes because they determine whether a baby will be a boy or a girl.
Chromosomes are typically shaped like an "X". However, sex chromosomes come in 2 types--"X" and "Y". (The "Y" is just an "X" with one leg missing.) If a baby inherits an XY pair of sex chromosomes, he will be a boy. If a baby gets an XX, she will be a girl.
But...the sex chromosomes don't actually affect development of the fertilized egg at the very beginning. When organs start to form, *all* babies develop female reproductive organs. Later on, the "Y" chromosome kicks into action, causing a release of testosterone (a male sex hormone) which then changes the female organs into male ones. What started out as a clitoris, for example, will grow larger and become a penis. If something interferes with that testosterone surge, even a baby who has "XY" chromosomes will *not* develop into a boy.
2006-06-20 02:21:49 · answer #1 · answered by Anonymous · 1⤊ 0⤋
Actually It all comes to Chromosomes.2 xx give you a girl xy gives you a boy.Women carry only xx chromosones and men are the gender definitor if you will which means either x or y will be chosen.But for your consideration of course know that babies grow without any gender for a while and the proff which is visible to all is that men also have breasts and the only thing that does not let it grow like women have is that men have more male hormons testosteron.There is a link that the chromosomes play the main role after some time in the fetus to give it's gender and you are right in a way i can saybecause they decide which hormons will prevail.But do note that as of conception everything is already clear meaning if two x join you will not end up with a boy later after 9 months and vice versa.
2006-06-20 03:49:53 · answer #2 · answered by anastazia 2 · 1⤊ 0⤋
Yes that is true. All babies start out as girls and then develop their organs throughout the pregnancy
Everyone has the chromosomes at conception to determine whether they will be a boy or a girl. However they start out with girl sexual organs. Which is why an ultrasound before 14 weeks is not accurate. Also there has been recorded cases where a person is born and have the chromosomes of a boy however they did not come down and develop properly so that person appears to be a girl but has a mans chromosomes and usually features.
2006-06-20 02:07:49 · answer #3 · answered by foolnomore2games 6 · 1⤊ 1⤋
No. All babies receive the appropriate chromosomes at conception.
Females have two X chromosomes of which one is copied into the ovum. Males have one X and one Y chromosome of which one is copied into the sperm. So an ovum has one X chromosome while a sperm cell has either an X or a Y. When the two meet, the chromosomes pair up and the fertilized ovum either has two X's (a girl) or an X and a Y (a boy).
So technically it is the father's sperm cell that decides the gender of the child and it is decided the moment that the first sperm cell makes it through the outer layers of the ovum to the nucleus.
As they develop, foetuses look very similar until the sex organs begin to differentiate and develop. This happens quite early on and can be detected on a scan.
------------------------------------
Edit: I am shocked by how many answers show this misunderstanding of the basic facts of life! Yes, it is true that it is hard to tell the undeveloped male and female foetuses apart until a certain stage but that doesn't make them 'girls'! (Maybe that's just my male pride showing, hehe!)
2006-06-20 02:07:23 · answer #4 · answered by Owlwings 7 · 1⤊ 2⤋
When Was Baby Conceived
2016-11-08 06:16:59 · answer #5 · answered by alterma 4 · 0⤊ 0⤋
The best explanation of how gender is determined is from the show Nova on PBS. Here is a link to that web site:
http://www.pbs.org/wgbh/nova/miracle/determined.html
You can track how the baby develops from conception to 16 weeks, either male or female.
2006-06-20 02:21:03 · answer #6 · answered by joleiey 3 · 0⤊ 0⤋
Yes... a teacher told me that in high-school. However the chromosomes decide the sex of the baby and they have those as soon as they are conceived. the baby only physically begins forming as a girl.
2006-06-20 02:21:59 · answer #7 · answered by angelpockets 4 · 0⤊ 0⤋
No - not in humans anyway. I think that may happen in sea horses. Humans have an XX or XY chromosome from the day they are conceived - XX is female and XY is male. The gender won't change.
2006-06-20 02:11:05 · answer #8 · answered by Anonymous · 1⤊ 1⤋
You are getting a lot of conflicting answers here. The way I understood it is, At conception it is determanded if its a boy or a girl. The organs (Penis) do not drop for a wile. So most babys "appear" to be girls at the early stages.
2006-06-20 02:25:43 · answer #9 · answered by The Answer Guy 2 · 1⤊ 0⤋
i dont know where u are from but in india knowing gender of unborn baby is very serious offence both for patient and doctor. because mostly here people abort girl child. so there is very much disturbed ratio of females per thousand males. and plz dont do this coz there should be excitment untill the baby is born. whether u have law or not...
2016-05-20 04:33:13 · answer #10 · answered by Anonymous · 0⤊ 0⤋