does the chromosome from the female or male determine if the child is male or female and why?

Question

CANT FIND SPECIFIC ANSWER SO HELP!

Answer 1

The last two chromosomes decide sex. Chromosomes carry DNA and decide in essense who we are when we start out life. the lst chromosomes are special, they decide gender. The egg will always carry an X. The sperm can carry an X or a Y. When it is XY then the baby will be male, XX is a female.

But gender is not decided by the chromosomes in the same way that we do not simply see with our eyes. Many sections of the brain are devoted to seeing, some people can see and now know what they see, some lack emotion responses to vision, and the like. We are beginning to understand that what the chromosomes say do not totally influence gender. Part of the mind decides what gender we feel, and despite what some feminists say about equality there are differences in the brains of males and females. Horomones can have an affect on the developement in the womb as well.

And yes it is true. We are all females by default. Since animals start off this way, I do wonder about Hyenas. Er... yeah, if you know about the species than that weird comment makes sense...

Answer 2

The male sperm determines sex. The male sperm carries both an x and x or an x and y chromosome. If the sperm that fertilizes the egg is an xy sperm the child is going to be male. If the xx sperm fertilizes, the child will be a girl. So the male partner determines sex of the child. Now, xx sperm do not swim as fast as xy sperm. But xy sperm, while faster swimmers, also die out faster than xx sperm. So the delivery of the sperm in a woman's cycle increases or decreases the chances for a child to be one or the other. If she is fertile when sexual intercourse delivers the sperm wave, chances are about 65% for a male child. If on the other hand, the sperm wave gets delivered say six hours before a woman's egg is in the best fertile position, then there is a 55% chance a female child will be produced. While if the sperm wave gets delivered and is the uterus say for 10 hours and the egg presents itself for fertilization, well then there is a 65% chance one will get a female child. If a woman can tell when she has ovulated, (droped an egg) figuring it might take 1/2 hour to get it into fertile position, and the couple wants a boy, well get cracking.

Answer 3

The father determines the sex. A female's sex chromosomes are XX and a male's sex chromosomes are XY. When the gametes fuse and form a fertilized egg, the mother has contributed only an X chromosome (cause that's the only kind she's got). The father, on the other hand, can contribute either an X or a Y chromosome. If he gives an X, then the baby-to-be will be girl (X from mom + X from dad = XX = female). If the father gives a Y, then the baby-to-be will be a boy (X from mom + Y from dad = XY = male)

Answer 4

The father :) As with other pairs of chromosomes, one of the sex chromosomes is contributed by each parent; they are of two types, X and Y. The mother supplies only an X-chromosome, but the father can transmit both the X- and the Y-chromosome. At fertilization, if the father's sperm is also carrying an X-chromosome, the child will be female. If the father's sperm is carrying a Y-chromosome, the child will be male.

Answer 5

Women have 22 pairs of autosomes, and 2 X chromomes, men have 22 pairs of autosomes, an X chromosome, and a Y chromosome. When a man's germ cells (spermatogonia) undergo meiosis to become mature sperm cells, one copy of each autosome pair will go to each mature spermatocyte, the X will go to one of them, and the Y will go to the other. So look at it this way:

Before Meiosis, in the germ cell you have
(1,1,2,2, 3,3,4,4,5,5,6,6 . . . etc . . X,Y)
the numbers are autosomes

After Meiosis, you have 2 spermatocytes:
(1,2,3,4,5,6 . . . X) and
(1,2,3,4,5,6 . . . Y)

Women's germ cells (oogonia)
(1,1,2,2,3,3,4,4,5,5,6,6 . . . X, X)

ALL mature egg cells (oocytes) have:
(1,2,3,4,5,6 . . .X)

So, combine the sperm cells with the egg cells, and you have 2 combinations:
(1,1,2,2,3,3,4,4,5,5,6,6 . . .X, X) and
(1,1,2,2,3,3,4,4,5,5,6,6. . . X, Y)

The top will be female offspring, the bottom will be male offspring.

By nature of our development, humans are DEFAULT females. The Y chromosome codes for a gene called SRY, which encodes a protein called TESTIS DETERMINING FACTOR. This protein stimulates development of testis, and the testis then secretes a phormone called Anti-Mullerian Factor, which blocks development of a uterus, vagina, cervix, etc. If not for SRY and Anti-Mullerian Factor, all humans would be FEMALE!

Answer 6

The male determines a baby's gender.

Answer 7

male; they have x and y chromosomes. females only have x chromosomes.