2007-01-11 12:07:01 · 8 answers · asked by wita 1 in Science & Mathematics ➔ Biology
Humans have 46 chromosomes 2 pairs of 23 chromosomes, one set from the fathers sperm and one set form the mother's egg. of the 23 chromosomes in a set one is a sex chromosome. Men have a X and a Y and women have a X and an X. So when sexual reproduction occurs men produce sperm and some of the sperm has a X chromosome and some has a Y chromosomes. All women produce egss with only a X chromosome because they have no Y chromosome. So, a man's sperm determines the sex of a baby. If a sperm that has an X fertiilizes the egg a female embryo is produced. If the sperm that has a Y fertilizes the egg then a male embryo is produced.
2007-01-11 12:22:15 · answer #1 · answered by Anonymous · 0⤊ 0⤋
The sex of the baby is determined actually by the male. Each sperm has 23 chromosomes. 22 chromosomes and 1 sex chromosome. It will either be a x or a y. The egg always has an x. To be male there must be a y. Males are xy and females are xx. So that's why when if the DNA of two eggs is combined, you will always will get a female. So when the sperm and the egg fuse, you get 46 chromosomes, 22 pairs and 1 pair of sex chromosomes. If there the sperm had a y then you will get a boy baby and if there was an x then you will girl.
2007-01-11 12:15:36 · answer #2 · answered by Anubis1345 3 · 0⤊ 0⤋
Each parent gives one of their sex chromosomes, randomly determined. The mother gives one X, as females are XX, and the father's chromosome determine's the child's gender, depending on whether an X or Y is given. If a Y, the child is a male.
2007-01-11 12:19:36 · answer #3 · answered by Kouya-chan 2 · 0⤊ 0⤋
I'm afraid the previous answerer got it backwards - males have an X and a Y chromasome, females have XX. Each sperm contains either an X or a Y chromasome, which means that the father determines the sex of the child.
2007-01-11 12:17:08 · answer #4 · answered by nightgardener 1 · 0⤊ 0⤋
all babies start out as females yes this is true, there is a chromosome that enters into the fetus and determines a boy or girl xx or xy this is what determines sex but it is interesting we all start out as girls huh?
2007-01-11 12:15:28 · answer #5 · answered by pa625 5 · 0⤊ 0⤋
boy has 2 x chromosomes. girl has a y chromosome and an x chromosome. when conceving a woman has x chromosome eggs and y chromosome eggs. a sperm has only x. if an x sperm and a y egg mix u have a girl. if a x egg and an x sperm mix u hav a boy. i hope it helped. i guess all that time in science and health really payed off. good luck!!! :)
2007-01-11 12:11:41 · answer #6 · answered by Anonymous · 0⤊ 1⤋
gay adult men inherit the features from their mothers. The "gay gene" escapes organic determination as a results of fact mutually because it inhibits a guy'a potential to breed it will strengthen it in women human beings. subsequently, women folk who carry it are possibly to be extra promiscuous and drawn to male bodies. it style of feels to be linked with features consisting of extraversion and openness in women human beings which makes adult men extra drawn to them. no longer all women folk with this gene could have gay sons. It randomly takes place the two a male or female gets it. the former will grow to be gay and devoid of reproductive fulfillment the gene itself will die out. The latter is known to grow to be very drawn to male bodies and it will set off pleasing features that stand out to adult men maximum advantageous to reproductive fulfillment and reinforcing it.
2016-12-13 03:16:56 · answer #7 · answered by symons 3 · 0⤊ 0⤋
the first answer is very close but wrong...xx means girl and xy means boy
2007-01-11 12:15:04 · answer #8 · answered by Anonymous · 0⤊ 0⤋